Non-reward pop-ups

Rakuten is running pop-ups in the upper right of my screen and not only refuses to stop, it is hardly possible to even contact them. The only contact info I could find on their site was an email to their PR and and a physical address in NYC for their legal. They didn’t respond to my email to their PR dept, nor to my physical letter to their legal department. I also did not receive a response from Brave community moderator about posting this post.