I got it back once but it wasn't technically frozen. It was just a stupid password problem, somehow my password stopped working. As for frozen accounts, no, never. They refuse to give it back no matter what I say, which is frustrating because just last week I was merely restocking on this one account, and it got frozen all of a sudden, and they claim I cheated. That's one big reason why I'm here too. Done with playing legit.
Depends on the reason for being frozen.If it was for protection yes I do get it back.
But if I caught on cheating then sayonara TNT will never return the account.