When a contract service related to a licence needs to be terminated, you need to process the termination from within the licence page.
Go to Member > Licences.
Find your customer’s licence and edit it.
Scroll down to the Contract Services section and find the service that you need to terminate.
Click the Terminate button.
Choose on which date you would like to terminate this service and click OK to save your changes.
The service will now be displayed in the list of contract services as Terminated.