You fixed them up, time to send them back, together.

We had ponies for my brother when he was a kid...worked with a guy who was kind of a "pony dealer" and had great ponies. We had one that kept bucking us off, that we sent back. He sent us another one to try who was part of a pair like Rook and Raven. It was a total disaster. She was such a mess. We had to send her back and the dealer put her back with her buddy and said they would just always have to stay together. (We then took the pony back we originally sent back because we missed him.)

Anyway, I do agree that is a lot of money in board for ponies you cannot enjoy. Let the rescue find them a home with someone that has their own place where they can be together.