I then reported it to Rollbit's Staff via the chatbox as well as their Discord server on multiple separate occasions.
I knew discord chat server (community representative), chatbox and support pages/emails have different persons in-charge, you should email them on their support email directly instead, if there's no bug bounty information/contact on their site.
With the same suggestion above with the reward given to you (loyalty bonus) you should request to remove the self-exclusion (unlock your account) and see for yourself on how things will goes after that.