Repeating year 12?

I finished year 12. Got my AS mock results and I passed (surprisingly). I got CCCB. But I have strict parents that want top grades, so my parents want me to repeat year 12 because they’re not happy. I passed and think I should continue on to year 13. I’ve had mental issues like depression and anxiety, and my parents think if I carry on to year 13 I might fail my A levels (unless I get my **** together). They really hate the college I’m at right now. What do I do? Should I repeat year 12 and try to get better grades or go to year 13? What if I repeat year 12 and get worse grades? What if I fail year 13? Either way I look at it, I’m ****ed. I just need to pass and go to uni but my parents want me to get better grades and repeat the year. Please help.