How do you cancel a lost/missing piece request?

[Doctor X 9]

Made the request a couple days ago, the part has since turned up, but I don't see anywhere on the site to cancel or update the request.  How do I go about it?

[evilidler 145]

A new support request, hoping they process it in time. I've found the end results of contacting them being excellent, but there's little to no real human response when replacing parts