I'm sorry you are going through that. I like the advice to simply tell them you forgive them and you are open to communication, and then leave it up to them.
They really don't know they are in the position to be the one asking for forgiveness. They think they are doing the right thing and that it would be the only way to help you (more like force you) to go back. They think you know what you did and what would happen and you brought all of it on yourself, but they really don't see how what they are doing is so wrong.
Try to look at it as a disappointment, but one that you can eventually learn to live with. You really need to do whatever you can to take care of yourself. Getting upset is only hurting you. You can't control how they treat you. It's too frustrating to even try. Writing to them so often with no response seems to put you in a submissive position, which I wouldn't have a great feeling about.
It'll get easier with time. Hang in there.