Just to clarify it, they did return your  deposit? May I ask if the Russian player was not allowed to play in the Playbetr? because if yes, even if you are a verified player but your country and other gambling site tighten the restriction in your country then I think you are still lucky that they still give back your deposit?

I think you should move this to scam accusation because even if its a gambling related, it still fits in scam accusation board