In your mail addressed to support-in@google you must provide the name of the Google product in question, describe the issue in detail, and any supporting document including screenshots that would assist with the resolution of your concern.
Contact Cloud Billing Support In the Google Cloud console, go to the Help and Support page. Open Help and Support. In the Category field, select Billing as the issue category. At the prompt, select Get billing support to access a dedicated billing support site, the Billing assistant.
Important: If you suspect a family member or friend made the purchases, you may be eligible for a refund. For Google Play transactions, you can request a refund.
It's not possible to cancel a UPI transaction after you enter your UPI PIN.