You can cancel your subscription anytime by clicking on the top right button and choosing Billing & Plans.

Scrolling down you can see your current plan, you can simply click the Cancel Plan option, which will keep your current month's or year's subscription active and running, but will prevent further automatic payments from going out from your default registered payment method.

After clicking Cancel Plan, you can choose to give feedback or a reason why you are canceling as this will help improve our services.