Have you, by any chance, tried to reset your password via a secret question?
right, I reset my password with a secret question ..
can I use my account again?
If you try to reset your password with the secret question I'm pretty sure this locks you out of your account automatically, because of a database breach or some other security concern awhile back. This is not a fun part of our forum experience and there should be something done about it. There should either be the removal of these secret questions, the restructuring of these questions or at least a blatant warning surrounding their usage so that you know what is happening. I've always wondered about the secret question flaw giving people the ability to lock anyone's account, or does it only lock the account if answered "correctly"?
Regardless, looking through your post history it doesn't look like your posts are painfully bad. Most people that are cut-off for spamming are very severe cases and you seem more clueless than malicious in my opinion. How do you know you were banned by Theymos?
There needs to be more explanation as to what happened immediately preceding your account lock, what messages have you received to verify your suspicions and what have you done to remedy the situation.
More on account recovery :
https://bitcointalk.org/index.php?topic=497545.0