Can't unsubscribe from 'You're Missed' emails

When you sign up for an account you eventually get these 'you're missed' emails offering 2 weeks of free VIP. Wonderful, of course. But there's an option down below to unsubscribe from them, but it doesn't work. I get a 404 page. It's bothering because I have at least one account on every single site and my email is very much spammed with these emails :')