Hello Onnnusss,
Thank you for posting in the Apple Support Communities. We'd like to offer our support.
As it turns out, you may need to connect with the merchant or your financial institution to change a refund that's already being processed.
We invite you to take a look at the support article below. It may provide additional clarification:
Get a refund for purchases made with credit or debit cards using Apple Pay
For additional billing-related questions, you're welcome to contact Apple Support directly. Depending on your region, you may be able to reach them here:
Get Support
We hope this information is useful. Kind regards.