Sorry, but the child is not a party and is not bound by the terms. The two parents are bound by the terms. But the child has no legal status in the divorce and can not sue to enforce the parent's divorce decree.
Not to mention, of course, that the child is obviously a whining, spoiled brat. The father paid 50% of the college expense and the mother guaranteed the loans for the rest and paid at least some of the payments. OP is an adult and needs to learn to be responsible for his/her own education.