Have your account been locked or been banned? If it's locked for some reason, you can unlock through following this-
https://bitcointalk.org/index.php?topic=5089777.0, in case it's banned for some reason, you are not going ti get your account back I think.
His account banned
10/14/2020 9:15:52 AM Changed to Archived status Autoban user
Possibly for ban evasion or because of plagiarism found by someone, which is most likely. Both the first and second leads to the fact that the account will not be returned.