Can I cancel my subscription?

Yes, you can do this by clicking on the "Payments" menu. In order to access it, move the cursor on your name in the top right of the window and select "Payments". Here you will be able to view all your active subscriptions; just select the one you'd like to cancel and click on "Cancel subscription".

N.B. If you cancel a subscription, you will no longer be able to view the included contents.