You can’t delete your account yourself.
However, their support is willing to do it for you. Try the form found here: http://uploaded.net/help politely request account removal.
URLS:
http://uploaded.net
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.