If a client who has upgraded to a Full Account doesn't want to continue using their Pagevamp website, then you can cancel their subscription from your Reseller Dashboard. Below are the instructions:
1. In your Reseller Dashboard, go to Clients tab.
2. Then, go to the settings of the client whose website subscription you want to cancel.
3. Now, click 'Settings' at right side of the screen, and then click 'Cancel Subscription'.