Blacklisted? Well, dark grey then.
Unfortunately, you can only deactivate your account by not logging in anymore. But you cannot cancel your account, can be read on http://www.beliefnet.com/Community/Beliefnet-Community-Help.aspx
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.