I did talk to customer service and they said there is absolutely nothing they can do until I submit KYC> They said no one has the ability to unlock my account except the security team, and they cannot talk directly with the customer.
I kind of made peace with the winnings stuck in there, and no plan at the moment to try and retrieve it via a mule.
$1200 is such a huge amount for people living in the third world and for poor people even in your country if you have no plan of withdrawing it you can just donate it to a friend who can try to retrieve it or continue playing until you lose it, you can enjoy playing that amount knowing that there's no way to withdraw it, but if I'm on your position I will try to withdraw it, if there's a will, there's always a way.
He couldn't do anything because he had made a mistake without him realizing it from the start.
All he can do is leave the site and don't try to do anything, let alone do KYC because that would be the same as giving his important documents to the casino.
Before he can withdraw his money, he needs to do KYC but the casino will still do something and the worst thing is that the casino can block his account without approving his KYC.
I hope he learns a lesson here and always makes sure to read the TOS of the casino and try not to violate them.