It sounds like several eye caps which can cause serious infections.
Clearly the guy didn't know what he was doing! If the cap is damaged or really thick I don't recommend trying to get it off or inducing a shed. There might be an infection under the retained eye cap & you can scratch the cornea. Some snakes even lose their eye.
Also since you have enough experience I'd say open his mouth up and check what is going on inside.
I wouldn't pay a dime I'd chew this guy out and tell him I'll take the neglected animal off his hands. I think the Vet is a must with this poor babe