How do I cancel my subscription billed through Google Play/Android?
You can cancel your subscription (including free trials) at any time. Subscriptions are automatically billed according to the period stated upon purchase (weekly/monthly/annually). The cancellation steps vary depending on who your subscription is billed through.
You can cancel your subscription on your Android phone or tablet, or on your computer.
ANDROID TABLET OR PHONE
Open the Play Store app on your phone or tablet.
Tap the Menu button (three horizontal lines), Account > Subscriptions.
Find the relevant subscription in your list, and then tap Cancel.
Go to Google Play. Sign in with the same Google Account that you used to purchase your subscription.