Brave does not use a typical support system. They seem to handle issues more on a global notification system versus a one on one basis. And there is a lot of DYOR involved. First time I’ve ever encountered this type system and it takes some getting used to! Still drives me crazy sometimes. 
There was a notice posted for Gemini users and I linked it below. Just follow the instructions in the notice. Do not post your wallet id! Just send it in a DM as instructed. Then wait. You probably will not receive a response that your DM has been received unless they need more information to resolve your issue. If you haven’t heard from them or your issue isn’t resolved in a week or so , then you should tag them in your post and/or check the status via your original DM. Don’t spam them asking for an update, that just slows down the process.
Every browser/device that you use has to have auto-contribute disabled. You might want to check all your linked Rewards to make sure auto-contribute is disabled for all of them.