3.17 Ethereum which is around 11,500$ trading now, until now nobody can believe or make sure of what you are saying until you provide the needed proofs, deposit proof, screenshots and conversations between you and rollbit team. 2 months of waiting seems a little bit annoying to wait for your earnings, especially if your deposit also is a big sum.
I prefer also if you open a case with casino.guru providing them with all proofs, it’s a good way to accelerate the process of withdrawing your money if it is deserved, however, if you have done anything against the casino rules, you should assume the consequences.

I don’t think that Rollbit would destroy their good reputation for such an amount of money.