In addition to the advice given, if you're still within the refund period and can get vet affirmation that the snake is in poor health you could go back and ask for at least a partial refund. It'd be trouble for not a lot of money probably, but at least they wouldn't profit off it. You could also use the opportunity to gently tell them some simple things they could improve about the husbandry. If it's not against store policy caring workers will usually try to do what they can.
When I adopted my BP from a chain petstore (too 'aggressive' to sell and wouldn't eat) it was pretty clear the person in charge of the adoption cared but just didn't know what to do. My husband and I usually talk to her whenever we're there to buy crickets or anything now, and we've had several conversations about alternate feeding techniques that can be tried for non-eaters. Unfortunately, the only technique that seems to work for mine is live-feeding which they aren't allowed to do at PetSmart.![]()