Here are the quick steps to help you cancel your subscriptions.
Step 1: Just login to the my account section from the store and click on "View and edit subscription" button
Step 2: Select the subscription which you would like to cancel, and click on "Manage your Subscription" button.
Step 3: Now, scroll to the bottom of the screen and click on "Cancel Subscription" hyperlink, add your reason for cancellation to help the brand and confirm the cancellation.
Quick Tip: Add an informative cancellation reason to help the brand understand the issue behind and improvise :)