Op has been using Rollbit for a long time, and he certainly completed the KYC identity verification procedures previously, and therefore Rollbit knew his nationality and place of residence, on the basis of which verification procedures were requested again to ensure that the user is no longer in Belgium, which is already banned. On this same basis, I do not know the extent of the legitimacy for the op to change his place of residence to a supported country and complete the withdrawal procedures. Perhaps this needs confirmation from Rollbit representative because the op did not discover that his country was banned until after the proof documents were rejected.
Well, in this case Rollbit has cheated OP, as on the one hand the casino knew that he is Belgian but on the other hand allowed him to deposit/gamble/withdraw at the time when the relevant restriction was the case. Thus their position is ambiguous and OP could sue them.
Thus, you got me in a wrong way. My way of thinking was something like the following - by recognizing OP as not been Belgian Rollbit could safe its face, because at the current situation if it agreed to pay him the gain then it would violate the rules which may result in the penalties.
But maybe I'm wrong, who knows.
Whichever is true I wish OP the favorable way out.
I understand your position, but why is Rollbit required to completely stop its activities in Belgium? The only thing is that it did not support Belgium, meaning that an account cannot be authenticated using Belgian documents. But Belgians themselves are not prohibited from using the platform if they are able to verify their accounts from countries that are not banned. I do not mean here cheating by using a fake identity or using a VPN, but there are certainly users with addresses outside Belgium or even foreign tourists in Belgium. It would be unjustified to monitor users' activities based solely on their location. Op wasn't to be in this situation if he is located in any other country not restricted even he is belgian. I am not that sure but i think this what logic says.
I agree that the platform is required to notify users of any update to TOS, and I still do not know if this was actually done in any way. In any case, I expect cooperation from Rollbit if there are possible solutions.