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 do not think any gambling site is suspect without any valid reason. They may use several factors to detect the same (similar person). As they have already aware of the OP and claim OP had accounts earlier that would be enough to ban an account for having multiple accounts.