post https://api.sandbox.bvnk.com/payment/v1/payins//refund
Initiates seamless one-click refund processing for any previous pay-in. Once accepted, a refund transaction appears in your merchant portal and can be acquired via API.
Upon activation, the system automatically generates a new transaction according to our standard workflow. You can request multiple refunds for the same transaction, as long as the total refunded amount doesn't exceed what was originally paid in.