Only in one message they answered in more detail and stated that the combination of my address and mailing address is in other accounts.
I do not know what they mean by mailing address but I guess what they are talking about your address if it is a crypto address could mean you are depositing and withdrawing money from and to the same address which makes the gambling site think the accounts belong to the same person.
No, they mean the home address/mail combination. Here's the quote:
"This email/address combo are both linked to the same account."
But it's impossible