Receiving monitoring emails for site that has been taken down

The site at https://remarkableretailer.com has been removed, but I keep getting lots (and LOTS) of emails telling me the site is down/up. When I try to log in to WordPress.com, I am told the user doesn’t exist, so I can’t remove the site from there. And of course I can’t get into wp-admin for a non-existent site. Could you please stop the notifications for this site that no longer exists? I see in the forums that you have done this for others. Thanks in advance for your help!

The page I need help with: [log in to see the link]