So I did my GCSEs on 2015 and passed all with A-C. Unfortunately the C was in Maths. So I wasn't allowed to take A levels since all the subjects I wanted to do required Maths grade at B atleast. And I had to take Business BTEC, which I was totally not okay with. Now it's almost time for starting to look for Uni but I am really not interested in studying any courses relating to business. Infact I am not even sure if there is a good course at the Uni's that will accept me with my BTEC Lv 3 Business qualifications. The reason I didn't do anything at the beginning when I had to take business is that I was new in the country, that is I came in this country at 2014 joined the school at the Last week of year 10. I was not and still am not quite familiar with the education system here. So I really need help regarding the fact if by any chance I could do atleast A levels Maths next year at any college in london after finishing the ongoing course I am in since I have gone through it quite far and have D*D*D* as my predicted grades as well. If yes then will I have to be paying for it? TIA.
You can do A-levels. You would have to self-fund, although it is also possible to self-teach at home.
However, for people in your situation, an Access Course would be better. Access Courses are designed specifically for those over 19 who do not have relevant level 3 qualifications but want to go to uni. I believe they take a year to do, so working hard, you should be at uni before you know it.