Urgent A Level Busines help please

It’s my worst subject, can someone give me a lot of pointers for paper three on the 6th June please? I always get E’s and U’s. Paper 1 went ok ish, paper 2 I got the dates wrong so it went horribly. I think i’ll get an E or U and I really need a C.

What can I do to get good marks in paper 3 because I think this will make or break my end grade. My teacher is terrible, so she never gave us any help whatsoever.

Any tips or pointers please beyond just the usual ‘revise content’ as the content never sticks in my head and I barely understand it as well. I’m really lost for what to do.