What you experienced was called "Self banning"! Here you can learn more about this,
ACCOUNTS WILL BE LOCKED IF THE SECRET QUESTION IS USED TO RECOVER ITAs far I know, you
MUST sign a message to prove your ownership in order to recover your account. But I don't see any address linking to your account as yours is a casino representative account. Not sure how it would be resolved at this point.
If a user is unable to sign a message from a Bitcoin address associated with their account or any other cryptocurrency address, or does not have a staked address, they should email the account recovery department using the email address they used to register the first time. In this case, if the account belongs to an official representative of a company, I believe it would be sufficient to contact them using the company's official email address or provide proof that the company is actually seeking to recover the account, not any other party.