Ask one of the admins to delete your account:
http://community.oasis.com/index.php?app=forums&module=extras§ion=stats&do=leaders
They usually respond quickly.
URLS:
http://oasis.com
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.