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I hope that the forum could help me.
Thank you.
Didn't they tell you that you are coming from restricted country or didn't you notice that your country is under the restricted list so you keep on playing in this casino?
Sorry to say but I think you will not get any help in this forum since they have no active rep in this forum (last online was on February) so I suggest you to try casinoguru.
Assuming that your case is real, both parties (you and the casino) made a mistake related to the restriction rules unless you previously hide your original IP by VPN and they caught you eventually.
However, as it seems that they have made a decision for you by giving your last deposit back, I think there is nothing you can do more.
Pushing them through 3rd party service wont really help IMO because you are breaking the T&C intentionally or unintentionally.
While you are right about the fact that both sides made a mistake, you have to see that one side had a huge financial gain from this "mistake" and other other side has a loss.
So if this is common it would be easy to blame the site to freeroll players from restricted regions. They should not accept a player, given he plays under his real IP and not a VPN of course. There is a clear freeroll scenario in taking the money from the player if he loses and banning him if he wins.
If you are so concerned of only letting people play that are legally allowed to, set some security standards to prevent players from those regions to register and especially deposit in the first place.
While of course a player accepts the TOS when registering, so he/she should be aware of those rules. You could easily say it's simply their fault. Yet, the site also is at fault for not preventing this to happen. Other sites also have security in place for this, why not razed?
White differentiates trusted casinos from others I guess.