You can cancel your subscription from your Accounts & Settings page, To locate the accounts and settings page; click on the alphabet icon on the dashboard to display a dropdown list. Select the settings page from the dropdown list to get redirected to the Accounts & Settings page as seen in the image below.
By clicking on the 'Cancel Subscription' link from the left navigation bar. You will get redirected to the payment page where you should click on the 'Cancel Subscription' link.
You can also send an email to firstname.lastname@example.org requesting to cancel your subscription