Well it sounds like she is going into shed and its common for them to not eat in shed. There's the first thing. Second, how big is she, weight wise? With balls its always helpful to have a small scale to weigh them to see if their little feeding pauses cause any harm. Have you tried live? Sometimes balls need live to stimulate a feeding response. I know I haven't had much luck getting new babies to eat frozen.
Another thing, balls really never like being assist fed. When your trying, does she try to bite you when your picking her up, or during the assist feeding part itself? If your assist feeding properly, there shouldn't really be any part of your hand in teeth range. I would recommend doing a search on YouTube for videos of assist feeding methods.
Good luck!
Also the pee and poo thing. Balls don't really have a timeline for stuff like that. Plus if there are no rats in her, what's she guna poo? Worry about the eating first. The poo and pee will come. Trust me. Lol.