Of course, you are right that the casino has a provision in the regulations, but does this mean that it can change the regulations at will and confiscate winnings in the name of the regulations?
No, they shouldn't confiscate your winnings as your account was created before the casino added your country in the restricted countries list. And they should block your account after refunding all your account balance. Winz.io has made another post today in your complaint at Casino Guru. They are going to refund your winnings as well. I hope you will update us here if they send your winnings to your wallet.
Considering the unique circumstances surrounding this case, we have decided to make an exception. We will refund the deducted amount of winnings to the player in full. Our aim is to demonstrate our commitment to fairness and customer satisfaction, even in cases where there might be uncertainties.