Use the direct link and follow the instructions to deactivate your account.
URLS:
http://memrise.com
http://www.memrise.com/settings/deactivate/
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.