How can I go from a C to A/A* in a level maths in 1/2 months?

So I’m really frustrated with a level maths, I made a post a while ago and I have seen some improvement. I am genuinely convinced that I can achieve an A/A* on my end of year for Economics and English literature, however a level maths is a different story.
I feel like I would get a C if i did the exam, I try revising but I feel like I’m getting nowhere I know this sounds like a stretch but how can I go from a C to and A/A* (I have my exam in April 30th but I’m pretty sure we can retake it) it probably sounds like a stretch but I really need to improve.
My issues with a level maths:
1) I do have some gaps in my knowledge ie. Proof, statistics, graph transformations which I am in the process of addressing by watching TLmaths, looking through my textbook, trying physics and maths tutor questions after I plan on finishing that this weekend even if it takes a couple all nighters
2) I really struggle with the new specification - (OCR-mei) emphasis on problem solving and modelling old specification is more direct I wish they kept it like that
3) I have an issue with exam questions specifically putting all my knowledge together, eg. Some modelling question contain trigonometry or some other chapter which makes it even more confusing
How can I address all of this most efficiently before the 30th of April?
Do you guys have any motivating success stories of improvements like this?
I want A*/A*/A at least due to me wanting to go to Baths, UCL or imperial for economics. I do extracurriculars and got an interview for target bath, hopefully that goes well and I also do work experience and seminars etc.

It's not a stretch, don't worry - I went from getting Ds to A*s in 2 months. What worked for me is doing lots of practice questions - that's it. As you are exposed to more questions, you will start to get the hang of the problemsolving aspect. It's really important to do active learning (practicing) rather than passive learning (reading) (although of course if you have gaps in your knowledge you have to read about it before you do the questions). I understand this is what you're doing, and that's great! Keep at it and you WILL get there. Also, make sure to take care of your health - having a good night's sleep will prep your brain for problem solving. I know this isn't drastically different advice, but if it's any consolation, I was doing practice questions and everything else you're doing for MONTHS and getting Ds. It was only in the final 2 months that I was able to improve, because all of the knowledge finally accumulated. So, don't worry, you're not alone in this, and I hope you get the grade you want! Keep going and you'll do it

Don't overthink, just practice like crazy and don't waste your time. You can get a lot of work done in that time frame. Complete all the questions in your textbooks (think 1-2 chapters per day), and then move on to doing as many past papers as you physically can. Keep practising, you will get better.

I have no idea who you are but gosh I am so incredibly proud of you!! Going from a D to an A*?? Honestly you are an absolute academic weapon that gave me so much motivation! I will finish filling my knowledge gaps and then I will go through as many practice questions, thank you!!

So I’m really frustrated with a level maths, I made a post a while ago and I have seen some improvement. I am genuinely convinced that I can achieve an A/A* on my end of year for Economics and English literature, however a level maths is a different story.
I feel like I would get a C if i did the exam, I try revising but I feel like I’m getting nowhere I know this sounds like a stretch but how can I go from a C to and A/A* (I have my exam in April 30th but I’m pretty sure we can retake it) it probably sounds like a stretch but I really need to improve.
My issues with a level maths:
1) I do have some gaps in my knowledge ie. Proof, statistics, graph transformations which I am in the process of addressing by watching TLmaths, looking through my textbook, trying physics and maths tutor questions after I plan on finishing that this weekend even if it takes a couple all nighters
2) I really struggle with the new specification - (OCR-mei) emphasis on problem solving and modelling old specification is more direct I wish they kept it like that
3) I have an issue with exam questions specifically putting all my knowledge together, eg. Some modelling question contain trigonometry or some other chapter which makes it even more confusing
How can I address all of this most efficiently before the 30th of April?
Do you guys have any motivating success stories of improvements like this?
I want A*/A*/A at least due to me wanting to go to Baths, UCL or imperial for economics. I do extracurriculars and got an interview for target bath, hopefully that goes well and I also do work experience and seminars etc.

It's not a stretch, don't worry - I went from getting Ds to A*s in 2 months. What worked for me is doing lots of practice questions - that's it. As you are exposed to more questions, you will start to get the hang of the problemsolving aspect. It's really important to do active learning (practicing) rather than passive learning (reading) (although of course if you have gaps in your knowledge you have to read about it before you do the questions). I understand this is what you're doing, and that's great! Keep at it and you WILL get there. Also, make sure to take care of your health - having a good night's sleep will prep your brain for problem solving. I know this isn't drastically different advice, but if it's any consolation, I was doing practice questions and everything else you're doing for MONTHS and getting Ds. It was only in the final 2 months that I was able to improve, because all of the knowledge finally accumulated. So, don't worry, you're not alone in this, and I hope you get the grade you want! Keep going and you'll do it