Welcome to the world of ball pythons. It is almost a question of when they will fast, not if they will fast. Hang in there and don't sweat it. I've had fasting events from several snakes over the years. I've never had one that starved themselves to death. If you want to try, and I have done this before go get a live mouse and feed that. It's almost like it hits a reset button on them sometimes. Will your snake demand live prey from now on after you do this? Mine never did. Ymmv.