Deal or no deal scam!
I played deal or no deal and won 50K then I never got credited! Then I played again and won 6K! And I logged out and waited and never got my coins!
I don't think there's anything GSN can do about game tokens not being credited sadly. I'm sorry to hear about your issue. If it makes you feel better though you can always try emailing email@example.com. Hasn't really been helpful to me to be honest but, they try their best I'm sure though I get fed up with them. It is worth a try.