The auto-renewable subscription is handled through your personal iTunes account on your iPad/iPhone. Look for the settings icon on your device.
1. Go to the settings menu on the ipad/iPhone
1.a: Go to settings -> Store -> Click on “Apple ID: Your_Email”
(If you are not signed in, click “Sign In”, and sign in with your iTunes Account)
1.b: Click on “View Apple ID”
2. Manage the subscription
Find “Subscriptions” -> Click “Manage”