UW rescind

I was given 4s for my maths according to my transcripts (I am taking IB HL maths course) and recently I got my results back and I actually got a 3! I asked for a retest but still there were no improvements. Chemistry was like a percent off a 5, and I wasn’t even given a chance to retest it. (I was given a 5 on my transcript)
For other subjects, some went up and some stayed the same. How big is my chance being rescinded? I am really worried right now and I would appreciate if someone could offer me some advise.