Your account can only be deleted through the username you provided to the support or their representative here. Your account can't be deleted without at least having to get a trace of your account either through your mail or username, for me I would advised you should send your details to the forum representatives since he is mostly active here, because sending mails could take days to have effects on your account.
Dr.Osh issue might be a little bit more complicated than that. His issue is not with support’s response time.
Blocking his account can be done quickly as soon as he provides his username, as the casino's OR confirmed above.
Dr.Osh is requesting that his personal information, which he submitted while completing kyc ,to be completely deleted. As I said, this might be a little complicated as the casino's privacy policies clearly states that they will retain the user’s data for a minimum of five years from the account closure:
we are obliged to retain personal data of players submitted during registration and any data passed on during the operative period of a Player Account for a minimum of five years from last player transaction or account closure.
Can't they make an adjustment to this rules as I know more people wouldn't find this part interesting to continue using site, as this could be the reason for Dr. Osh account closure, but however even though he deletes his account the details still remains within the system so he it's not entirely gotten rid off from the their system.
Though most of the gambler doesn't even cared about their information being retain on some site, but those who definitely cares about privacy wouldn't be that finding it funny to leave their information behinds.