@MekLek I found this email address from the following links, since I was affected by this too.
[email protected]
I just sent them a note and it did not bounce back, unlike the first email I sent to refunds AT brave.com
For the record I followed the same thing you did - sending an email to uphold, and they basically said go to the forums. Useless. In my search I did find a couple threads that relate to this topic if you want some more reading… or perhaps for some other observer in the future: