That's sad. It's clear from the picture that the cage is dry as a bone. Sadly there isn't much you can do. You could go back and be more pushy about the fact that they need to be more vigilant about the care that they give the animals they have for sale. You could even go as far as to call your local humane society or animal control and file a report. But unfortunately none of this will likely do much good. The sad thing is that with very minimal effort the staff there could easily remove the stuck shed from that boa and top up its water bowl. This you would think would be a no brainer if for no other reason than they are trying to sell that snake and no one in there right mind would buy it in that condition. If I were you I'd probably just find anouther store to buy feeders from and hope for the best for that boa, and all the other animals they have.