Can you record the proof on video and post the link of the video here to see what's going on.
OP claims their account has been banned, so there is nothing to take a video of. All they could do is take a video of unsuccessfully trying to log in to their account.
Rollbit Razer has already posted in the thread, saying they are aware of the player's activities and that they have had accounts on Rollbit before that have been banned. Since the previous account(s) got banned for sports abuse, it safe to assume the most recent one was also banned.
The only question that remains is whether hugarden2 is the person Rollbit suspects them to be.
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.