You are a fool for trusting these services with this amount of money. Extremely foolish.
If you had done any research on Rollbit, or stake, (maybe even duelbit too), or just about any website on this board....you will have noticed that demands for KYC to unlock accounts/balances are almost never fulfilled almost every time a user is asked for it. Usually, the cases are for players who are playing even 1/10th of the amount that you played with.

I am not on the side of the casino, however to see these amounts being trusted to off-shore and essentially anonymous entities, is very disappointing to see. While you wait for your money, they are probably laughing and probably smoking cigars that you paid for.