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

In order to avoid such 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 its expiration date.

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

If you did not cancel your subscription during 24 hours, unfortunately, you will not be able to get a refund after that.