What London Sixth Forms allow resits for year 12?

Hi, after struggling from depression during my first term of year 12 and dropping maths in my second term and starting sociology, the catch up work is just too much. I have to catch up on basically all three of my subjects and my economics teacher is very bad, she hasn't even taught in the UK curriculum before and is from Pakistan. I'm sorry but she isn't helpful in explaining concepts and just reads off the board. There's no other teachers, we don't have uplearn and I can't drop it because I want to go into accounting so economics is the most useful and relevant of all my subjects.

Therefore, I would please like some recommendations of sixth forms anywhere in East London where I can resit year 12.

General question, do you think I should resit year 12 based on my circumstances? I want to do an audit apprenticeship after sixth form which highest entry requirement is BBB. But I'm not sure I'll even get that.