How to cancel subscription purchased via Google Play Store?

If you subscribed through the Google Play Store, you'll see the message written on the screenshot below:

 You can cancel your subscription by following these steps:

• Open the Google Play Store app on your Android device.
• Tap the menu icon (three horizontal lines) in the top-left corner.
• Tap "Subscriptions."
• Find and tap the VBTV subscription.
• Tap "Cancel subscription."

Once canceled, your subscription will remain active until the end of the billing period.

For more detailed instructions, you can visit Google's support page here. 

For any refund requests related to subscriptions billed through the Google Play Store, you’ll need to contact Google directly. To request refund from Google Play Store, please go here.