Deleting your account is easy.
From their FAQ: Please follow the steps below to delete your account:
Login to your account
Click on ‘Account Settings’ beside your avatar
Under ‘Remove Account’ section, enter your password
Bye bye baby
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.