Accounts get closed, sometimes for real reasons some types by mistake. There was a woman on Kindle boards who lost her 3G connectivity, Amazon had turned it off for some reason. She called, they did some research, and a few days later it was back on. Amazonis not perfect and does make mistakes.
It sounds like Amazon made am istake here some how. Which is why I would call Kindle Support and keep a log of all conversations. I would also email Kindle support and keep a log of all conversations with them.
I think that these things can be resolved.
Hopefully the OP is not blowing smoke up our butts. His initial explination, while a bit different then some of the reasons I have heard for accidental closure, sounds legit. (shrugs)