I think rollbit should be flagged as a scam because they don't want to give any comments intentionally, they play games and refuse to solve the problem. I can assume they don't have any evidence.
Except that they've give
a comment regarding your issue, their security and anti fraud detection system matched your ID with known accounts evading sportsbet limitation. That's their final say, I think. You can't demand them to give detailed info of their detection here for public to read.
If you still want to pursue this matter and sure you're the right side, you can do what
Pmalek suggested by contacting a third party mediator. I took a quick glance and didn't find them on thePogg, gamblescope, casinomeister, and askgamblers, though. They're on CasinoGuru, but CG are not handling a sportbet-related disputes.
Since this case involves an issue with sports betting, I don't think Casino Guru and Ask Gamblers will consider it. I remember they only handle casino disputes looking at some past cases. [...]
AskGamblers accept and intermediate sportsbet-related disputes, but Rollbit isn't on their list.