The thing that makes me think the dude may be sincere, if with a misplaced sense of who's responsible for his screwup... Is that if he was making it up, he could have come up with something less boneheaded for a story.
Fact is, unsticking the thing shouldn't be a complicated process. If he jammed a T-mount adapter on there, it's possible there's a loose set screw in there that won't let him remove it. Otherwise, it'd have to be just cross-threaded or on a poorly-machined adapter. Either way, the procedure shoudl be the same there.