Bashed,
Sorry to tell you, but you are in a total losing position here. You are not going to win her parents over, and after past actions you and she have been involved in, they will never allow you near her or them, unless they are idiots. Parents believe they are doing the best by their children, or most believe they are, anyway. Whether they are or not, unless what they are doing is actually illegal, nobody can interfere and get away with it. The parents will only come down harder on the child in question, with more rules, more restrictions, more watchfulness, and less opportunity for the child to go the other way than the parents want.
Not fair? Probably not. But to the parents' way of thinking, what you have tried to do is definitely not fair. I threatened more than one of my teens' suitors with jail and/or physical harm if they didn't end attempted relationships my husband and I did not approve of. That is a natural protective instinct for a parent. Trying to go around them will only make them close ranks even tighter.
Bottom line...You and she want to go your own way? As soon as you are both of legal age, feel free. Until then, you are only butting your heads against a stone wall.
BTW -- an arrest record is not a good thing to have. It's not worth it.
I'm not JW, but that's my 2 cents, as a parent.
Susan