In order to cancel your subscription, please go to "My Account > Settings > Account Settings > Manage Subscription > Cancel". Click on the “Cancel my subscription” link at the bottom of the page and follow the instructions. Please give us your feedback, it would be very helpful for us to improve!
Note: your account will remain active until the end of the month you've paid for.
You can also check out our ASO Blog, to learn more on how to increase your app's visibility and boost organic app downloads