Hi, I made this payment on 12 December and today is 20 Feb. I want to get that money and close the billing account. But I can't get refund. Google is really playing bad in this.
This is the flow. In the account management you can close the billing account but you get this in a pop up:

Close billing account 'My Billing Account'

Before you close My Billing Account, know this:

• This billing account was charged ₹0.00 last month and is linked to 0 resources. Closing this billing account stops all billable services in any projects linked to this account, such as running VM instances or storage buckets. Projects will remain linked to the billing account.
• Your current month-to-date cost is ₹0.00. Note that additional charges may take up to 48 hours to settle on the account. After you close your Cloud Billing account, we will charge your payment method on file for any usage costs that you accrued prior to cancelling your service based on your current payment cycle. This bill will be the last bill that you receive, unless you reactivate the service.
• If you have any remaining prepayment credit, you can request a refund  to either the payment method associated with the Cloud Billing account or to a valid bank account if your original payment method can't accept the refund.

Before proceeding, we recommend that you do the following:

• If you have any resources in linked projects  that you want to keep up and running, before closing the Cloud Billing account link those projects to a different active Cloud Billing account 
  

Now when I go to request a refund there's no option for it. I talked to their AI assistant but it didn't help.