Refund request for accidental Gemini API prepaid credit (unused)

Hello Google Support,

I accidentally purchased prepaid credit for Gemini API in AI Studio
and would like to request a full refund. The credit is completely
unused — no API requests have been made and the balance is untouched.

  • Billing Account ID: 01F8D7-C7D2FD-F260..
  • Purchase Date: 2026-07-21
  • Amount: 25,000 KRW (incl. VAT 2,273)
  • Payment Method: Mastercard ending 684..
  • Invoice No.: 56350337..
  • Transaction Ref: LGU9734708554504490..
  • Current usable balance: 25,000 KRW (untouched)

This was a mistaken purchase. I kindly ask for a one-time exception
to refund the full amount to my original payment method. Thank you.