How to delete your Best Buy account

Contact customer support via phone: 1-800-BESTBUY.

Or drop them a message on the forum: http://forums.bestbuy.com/

Should have been a lot easier, but at least they respond to your request.
URLS:
http://bestbuy.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.