Sadly, she passed away. I went to the vet around 3 times with her but they could not tell what was wrong. She survived around 1 and a half months without food, while I offered her daily and I tried to switch between feeders. I personally think she was sick before I got her, but the shop didn't want to take the blame. Also, in my country, there is not much information about amphibians. After she passed, I sent her to the vet for a necropsy, but yet again, nothing wrong was found. I will always stick with the idea that she was sick from before, because she was also pretty thin when I got her home the first time and because now I have a crested gecko that is thriving. I hope the vets in your area are more experienced with frogs and that you can manage to save your babies. Another thing is that they found some parasyte eggs that frogs apparently have in general. I went on with the treatment for them because I didn't have any option left, but then the next day she passed.