The subscriptions are automatically renewed before the end of the paid period. A player can be charged up to 24 hours before the subscription period.

To avoid such an experience, please cancel your Subscription as soon as you decide that you will not renew it. Do not wait until the last day since the Subscription can be renewed one day before expiration.

You can cancel your Subscription within 24 hours. Learn more about how to cancel your Subscription: Google Play, AppStore

If you did not cancel your Subscription within 24 hours, unfortunately, you will not get a refund after that.