20 digit code "already registered" after several days of successful playing?

[warmech5]

I had a few days where it worked fine. Then on 8/30, it said "the server disconnected" or something like that (Phoenix server), and when I tried to log back in, instead of just wanting ID and pw as usual, it asks me to register again, asks for the 20-digit code, and then says the 20-digit code is already registered. Also the login info, TOS, etc. that was previously saved, is now unsaved, as though it's a fresh install.

So the ID and PW are good, but it's as though it no longer associates the 20-digit code with my account, and therefore I can't get in-game. I only have 1 account and it's the one I originally registered the code with, so...

Reference my ticket, 2710664
Please advise, it's been 4 days, thanks.