4. How do I cancel your Premium Subscription?
Step 1: Launch the Settings app.
Step 2: Tap iTunes & App Store.
Step 3: Tap on your Apple ID.
Step 4: Tap View Apple ID when the pop up window appears.
Step 5: Enter your Apple ID password or fingerprint ID when prompted.
Step 6: Tap Subscriptions.
Step 7: Tap the Subscription you want to cancel.
Step 8: Tap Cancel Subscription.
Step 9: Tap Confirm when prompted to confirm that you want to cancel your subscription.