Follow these steps to view, change, or cancel your subscriptions:

On your Android device:
  1. Open the Google Play Store app.
  2. Tap the Menu button in the top left corner.
  3. Tap Subscriptions.
  4. Tap the subscription that you want to manage.
  5. Here you have the options to cancel your subscription, restore your subscription, or change your payment method.
 
On any web browser:
  1. Sign in to the Google Play website.
  2. Click on the account icon located on your upper ring hand corner and select "Payments & Subscription," you should be able to select the Subscription section.
  3. Find your game and click on Manage.
  4. Here you have the options to cancel your subscription, restore your subscription, or change your payment method.
 
For more information on your Google Play subscription, please visit Google Play's subscriptions support page and the subscriptions section of Google Play’s Terms of Service.