If there are transactions using GoPay that are unknown to your Google Play, please check your GoPay  History page. Every transaction you make using GoPay will be stored neatly on the page. 

You can also do the following things:

1. Check and confirm with your family, friends, or closest relatives regarding Google Play Store transactions that you don't recognize, whether they were being used without your permission or connected to other devices. The transaction that have been successfully purchased will be listed in the format: GOOGLE PLAY [App Developer Name], and not [App Name]
2. Confirm to Google via the following link https://bit.ly/3sI91Ae
3. To request a refund from Google according to their policy, visit the following link https://bit.ly/3vedYEP
4. To cancel a subscription from the Google Play Store, visit the following link https://bit.ly/3MhHcbO

Please note that if you subscribe to a paid content or connect GoPay as a payment method on Google Play, your GoPay balance will be automatically charged per Google's guidance and we will not be able to make a refund because the issue is not in scope of our Money Back Guarantee program.

Hope this information help you.