You can cancel your active subscription(s) anytime by logging into your account, hovering over your name at the top right, and then clicking My Products and Billing.
On the right side of the My Products and Billing page, you'll see a "Billing Overview" area with some details, along with a "cancel" button.
Click the "cancel" button and to be taken to an updated Product Selection page. This page will show the product subscriptions that are being removed. Click the confirm button at the bottom right and then proceed through the confirmation modal to finalize the subscription cancelation.