I'm in a very similar situation. I want to do management next year and the typical offer for most uni's are ABB, i just got my results and got CDDD.
But I do not want to resort in repeating year 12, i think if we work at it and really knuckle down this year, we may be able to turn the results around.
Basically, what i'm going to do is use the remainder of the holiday to start revising for retakes and work out exactly how many UMD's i need to achieve for a certain grade.
The only thing i am worried about is predicted grades and sending grades to uni on application, but by declining the grades and assuring your teacher you will do well in A2, i think they are willing to predict higher than what they actually think. Got to make sure that the personal statement is really good aswel.
I know we are in a real mess right now but i really think by focusing and working hard next year, things can turn out good. Gotta look on the bright side.