Neighbor just appealed son’s COA at a top school due to income disparity from 2018 and went from $70k+ contribution to $56k. They are taking half of that amount in loans. Yes, their kid could have done a SUNY for half that price, and, yes, I believe they are almost certainly going to see an uptick in costs in future years, but for now they feel they can swing this. Apparently worth it to them to go to a private college with what they feel Has more name recognition.
OP, you and parents can put in yet another appeal, but if it’s no go— you’ve already presented your case, then it’s really up to your parents to decide whether they are going to come up with the money, likely through loans. If you can’t pay for the school, you can’t go there. So, if they won’t pay, you either do a gap year or find an affordable school that will take you at this time.