That is very weird. No water in the tank with the snake!? Beat that shop with a stick. That is normal for the snake to not come since you just got him. You shouldn't handle him for another week or two, moving is stressful on a snake. Also, you can soak him in water and that should help him get the skin off of him. Do not put him in that bedding, especially if their are bugs in there. Either go and by some good bedding, or put him on newspaper. Make sure he/she has water, and proper temperatures, and not 24/7 light.