whenever I message support all they is this: "Hey there!
Apologies for the inconvenience. We awaiting a colleague here to have a look. The ETA may vary depending on workload.
We will update you as soon as we have further information to share. Thank you for your patience!"
Wait one more month I would say. Three months seems okay to make a conclusion.
If you don't have a reasonable response then you can collect evidences like deposit information, bet history, withdrawal ID (if there is any) and then create a scam accusation but as per my knowledge Rollbit is a reputed casino and they takes their issues seriously. Considering the reputation, I am hoping your case will be resolved soon.