Where can I cancel the the customer's subscription?

You can cancel the customer's subscription by opening it in the app and clicking on the "Cancel subscription" button. We also have a video tutorial on how to do this here: https://www.youtube.com/watch?v=TmuQBzPLJpo&t=203s.

You can also cancel the customer's subscription by going into the customer's portal and clicking the Cancel subscription button. A link to the customer's portal can be found in App settings -> Subscriptions -> click on a subscription -> Access customer portal.