You may cancel any service at least 48 hours before renewal date. No refund shall be issued for cancellation after the renewal.
Please login to the billing area here
http://www.QualityHostOnline.com/clients
please follow this path from the top menu, after you have logged into the billing area
Services >> My Services >> View Details [click the drop arrow] >> Request Canellation
Domains are automatically cancelled if not paid/renewd before the due date.