Google will charge your account if you did not cancel your trial more than 24 hours before your trial period ended.
Google will also charge you if you were not eligible for a free trial, click here to learn more.
Google will process refunds If It’s less than 48 hours since you bought an app or made an in-app purchase, you can request a refund through Google Play or try reaching out to Google by tapping here. You can also tap here to learn more about how to get a refund from Google.