To cancel your subscription, log in to your account using your account information. When you first log in, you should be directed to your "Purchase History" page or you can click on the "Account" icon in the upper right-hand corner of the page at anytime. Click on "Manage Subscriptions" from the menu on the left of the account page. Once on the subscriptions page, you can select "Cancel" next to your existing subscription. You'll be prompted to answer a couple of questions about why you're choosing to cancel, and then you'll click "Cancel my subscription" to finalize.
If you have any trouble canceling your subscription, give us a holler at email@example.com and we'll be glad to help!