Have you considered going back to the original vets office with the pictures and second vet bill in hand? I think it may be a little harder for the vet to deny you a refund if you are there in person ready to show her your proof. It may be harder to maintain your composure and not be emotional but you may have a better chance of getting a refund. Just a suggestion. I hope your snake is healing and am so glad to hear you've found a vet you can trust. Good luck!