How to cope with not graduating?

So.. I'm not graduating, I mean.. I'm still going to go to grade 10, I'll get placed.. But I know for sure I'm not walking across that stage, for one I don't have ANY mark for 2 of my cles and that's because the school put me in a little " skills " group with two other girls, they made us drop all of our REAL cles basically, it was just their way of saying " Your too stupid to be in regular cles and the teachers don't want to waste their time trying to get you to understand the work, so we'll just put you in this little stupid group where you don't do work " All we did was cook and ' raise money ' I'm not stupid, I know that's what they were doing, trying to make us believe we were actually working when we weren't doing anything productive, I rather fail knowing I tried then to not try at all. So me and the other girl in that group told the principle we wanted out of that group because we weren't learning anything.. Anyways, now my marks are gone for every class, and school is coming to an end in like 12 days. I know I wasn't the best at science or Math or Social Studies, but I know i COULD have made my marks go up to actually pass grade 9.. but now, it's literally IMPOSSIBLE because i have NO mark for either science or social studies, ( since they took me out of those classes for like months ) They think just because I'm not good at some classes means I never tried, well that's not true, it was just too hard for me! I was struggling, I tried my best but it was just too hard! And they didn't help at all, my math teacher last year did EVERYTHING he could to make me pass, he stayed with me after school EVERY DAY to tutor me, but this year the teachers WONT, they won't even stay in at lunch to help me? So.. It's their fault. But anyways.. I'm just soo devastated that I'm not going to walk across that stage on graduation.. My mother was talking about it the other day and I felt soo bad because she thinks that I'm going to graduate, and I'm not, I feel like such a failure :( It's going to be soo humiliating, I don't even want to go to prom . :(