Refunds
Apple:
Go to reportaproblem.apple.com. Sign in with your Apple ID and password. If you see the "Report" or "Report a Problem" button next to the item that you want to request a refund for, click it. Follow the instructions on the page to choose the reason why you want a refund and submit your request.
*Note Apple must submit your refund
Android:
On a mobile browser (like Chrome), open play.google.com/store/account.
Tap Order History.
On the order you want to return, swipe left and tap More.
Select Request a refund or Report a problem and choose the option that describes your situation.
Complete the form and note that you would like a refund.
*Note Google must submit your refund
Canceling
How to see or cancel subscriptions on your iPhone, iPad, or iPod touch
Open the Settings app on your device.
Tap your name.
Tap Subscriptions.
Tap the subscription that you want to manage.
Tap Cancel Subscription.
Cancel a subscription on the Google Play app
On your Android phone or tablet, open the Google Play Store
Check if you're signed in to the correct Google Account.
Tap Menu. Subscriptions.
Select the subscription you want to cancel.
Tap Cancel subscription.
Follow the instructions.