OP hasn't been able to prove his ownership over the account for more than 5 years. He (or someone else?) posted
a similar topic in 2020 using another account and there was no success.
Maybe, OP didn't have access to the email address used for the locked account and he sent the email from a different email address.
For arguments sake, lets consider OP lost access to their official email address that were used to register to the forum and as well as the ability of sign a message since they never posted any address here. So in this case what should be done to recover the account? Is is possible that the admin would consider things from their casino site? I saw that the site they are representing is still active to this day. So what if they posted a message in their website to theymos regarding this matter? Will it be able to help the situation in recovering the account? I haven't seen any case such as this.
This is only a theoretical question of course.