Make sure to take screenshots of any chats etc to protect yourself if you are in a grey area jurisdiction.
If a casino adds a new region to their banned jurisdiction, they should email their users to let them know about the changes. If they don't inform users, at least they should allow players to withdraw their existing balance if they see the player registered before they make the changes. If they did any of it, there is nothing wrong.
I am curious if you had any problem with them. Even if you had, describe what was the problem so we can know more about it. If you say random things on a anonymous forum without showing any proof, no is going to believe you. Would you mind sharing the screenshot?