Let's break this down.
Generally for most students C1 is taught from September to January and on average for your run of the mill cohort you will spend about 14-15 school weeks learning the module with around 3 hours contact time and an expected minimum of 1-1 hour non contact time per week (every hour you do in a lesson, you do one at home).
I expect that as a minimum and many who enjoy the subject do more.
The idea that anybody will learn C1 in 'x' days and get 'y' UMS is something reserved for very few and is not general advice that should be taken as a given. This is highly unrealistic for the majority of pupils.
Doing past papers will not teach the subject. Past papers are suited to those who have covered the course and want to polish their prep. Again, the idea of learning A level maths from past papers will never be suggested to you by a teacher. It simply leads to huge gaps in understanding that get exposed later on and most pupils I know who try end their maths career in the first 2 weeks of A2.
What can you do?My suggestion is to knuckle down and learn C2 and sit the exams together in May and be prepared.
How can you do that?Lots of way, but the main point is to realise that you are highly unlikely to be able to posts a similar message in the week of C2 and get anything from an AS in maths.
Here are some ways:
Get a book you can enjoy, are motivated by and can learn both C1 and C2 (Edexcel/MEI and OCR all have specifically written books)
Get a study partner. That may help, may not but if you like working together you can have the help and motivation
Use your teachers. They do want to help (well most I do want to)
Use the internet:
www.m4ths.com www.examsolutions.co.uk www.livemaths.co.uk are all good sites for learning along with many others
Please don't though believe maths is about learning and cramming before an exam as you may come unstuck long term. C1 is relatively easy in comparison to other units you may do and a long term strategy for sustained learning is key.