Don't call back. Go to the Watertown branch. Get in line to renew your license- play dumb. Feign utter horror if and when they pull up the messed up info. Have any and all proof of anything you can collect with you beforehand. Get ready to be sent from window to window like a pinball. It will get solved, you probably won't have to do what the other person told you you'd have to do- but you need to go in person. It's easier for these power-crazed bureaucrats to go bananas if they aren't face-to-face with their prey, confronted with arched eyebrows and disapproving glares.