The good news is that using the secret question caused the account to be locked and the hacker can't use it now.
You should contact the recovery team. The link to the instruction was shared by _BlackStar above.
You will get access to your account if you can prove that you are the owner of that account.
Sorry, I couldn't get that fact correctly....
Do you mean an account can be hacked using the secret questions and the process gets terminated on the way, due to inaccuracies? If yes, then how's the OP gonna get 'em back after every claims that he's rightfully the owner of the account ??-- (remember, that's after when the hacker had changed the passcode already?)? This is only possible if the forum has access to people's personal data, Which is curruptible in my opinion...or is there an alternative?
By the way, I can't verify the message you signed.
The same thing I was wondering too.
Sandra 🧑🦰