Well the heat pack issue should have definitely been discussed with you. Bad on his part to not talk to you and let you help in the decision since it is YOUR snake now that you paid for it.
And if the breeder is who i am thinking of as i think you mentioned it a while ago, I too was not aware they were EU based. I have heard good things though if it is the same people i am thinking of. Although now with your issue and lack of communication on the US part with shipping, I would think twice but then again, if i was looking for a carpet, I would go with Inland Reptiles as he lives fairly close to me and has a stellar reputation with carpets. There is also Ed Lily for carpets too who is/used to live by me. His animals look good even though i am not a fan of his cages![]()
Anyways, your snake should be fine and even if you dont get any form of compensation, if the snake heals up fast and with no complications, then you can at least just write this whole dilemma off as a learning experience.
Good luck with Yafe.