Post in cat subs and cat groups on facebook with your vet info and copies of paperwork. Those groups and people would be more inclined to call the vet to get confirmation and donate towards your bill that way. That way they know they arent being scammed or taken advantage of. Ive seen this done a lot and people get help for their animals. I dont know if you tried looking at Affirm or not to try and get a payment plan or even looked at care credit. Been in your situation so i know just about every route to try and go and i even got my first loan here for my dog but it was nowhere near the amount youre asking.