Save my kitten’s lifes.

My cat gave birth to three little babies , as I know she Is the one that needs to take care of them but , she gave birth too fast and because she was too tired , didn't clean them completely. Two babies are having problems with their legs because as they weren't clean enough , the ombilical cord has been sticked to them , after I saw that I knew I should help them , I cut the cord but saw that one of them , has both of his legs broke , and another one just one leg. I asked a person what should I do and she told me to go to a vet and there they will likely euthanize them. I would be okay with this idea if they wouldn't be so energetic , but I see them like they are fighting to live and I don't want to just take their life without doing something. I'm doing this campaign because I am poor , my dad died last month , I am a highschooler and my mom doesn't work right now , I have a weak heart and I really want to help them , If someone can help us , I'm thankfull , and I hope the ones that really donates have a good life.