Odette, if your aggregate is wrong, then you
definitely have grounds to fix your ENTER score. If it goes up to the high 80s range, that is a great score. 65-75, like Eriny said, isn't bad, but yes, for someone like you, you deserved more.
Your parents are in the wrong, and I have no respect for them in the way they have treated you. In times like these, you have to pull yourself up, and realise that you are serving for your interests, and ignore your parents for the time-being.
If your ENTER changes never come to fruition, I would advise against repeating VCE. Pathways through university are a much more refreshing route, and will relieve you of the nightmares that you have faced this year.
Good luck for tomorrow Odette! I hope everything works out for you.. You so deserve it....more than most in fact. 
I would resent this because I believe a lot of people deserve their scores.