There is no immediate deletion URL. You should send a message to Amazon (see link). If you actually buy at Amazon, do read the page well, about cancelling outstanding orders.
URLS:
http://www.amazon.com
http://www.amazon.com/gp/help/customer/display.html?nodeId=565164
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.