They're asking you to LIST your other accounts in their casino because if you have two or more accounts, then you have broken their rules which you have signed not to break during registration. They are also sort of sure that you have more than one account, which from the chat, you never addressed. You merely posted your other complaints in CasinoGuru.

If you don't have more than one account, then tell them, AND ask them HOW they concluded that you have more than one account, or WHY are they accusing you.