I hope your med get there soon, this is very unfortunate. The only thing I can think of to help get them eating agian is somehow dividing the tank up so they are int here own individual quarintined area and feed blackworms. I have seen some really bad shape rays before and separating them from the other rays and fish and giving them there own food source with no compition. It takes some time but usaully they will come around and eat the blackworms. I just trying to throw anything out there that might help you out. I got my fingures cross that they get better soon for you.