You cannot delete your profile.
From their own FAQ: “You can remove your email address and all personal information from our system by accessing your account settings.”. This is how they handle your privacy. Sad.
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.