Unable To Stop Slickdeals Hot Deals Notifications

I still get the Hot Deals email weekly even though I unsubscribed from all Slickdeals forums last month. No matter how many times you click the unsubscribe link in the email, you'll always get a 404 error. I have not heard back from Slickdeals' customer service team, even after calling them. To add insult to injury, I have requested removal from the Hot Deals mailing many times in response. Even after removing the browser extension and disabling all options in my account settings, I continued to receive emails and notifications yesterday. Customer service seems to be totally unresponsive, and I don't know what to do as a result. The constant barrage of emails and alerts is getting old.