They did not give a reason.
It is a common scenario that when any website (financial related) either crypto exchange site or gambling site or any other financial related site ban your account then they will not clearly say the perfect reason of disabling your account or account balance. Where legit website do not say the right reason then how you deserve that a scam site will provide you the reason.
if the site is legit then the reason for banning will be released and it will be transparent to everyone specially in this forum that there are already tons of cases filed in every casino and those legit one are answering and addressing the case truthfully while scam casino will leave the problem and just randomly settle someone's case.
I am lucky because never that i experience any thing in trouble to all the casino I have played over the years.