curl --request POST \
  --url https://api.novacpayment.com/api/v1/refund \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reference": "<string>",
  "customer_note": "<string>",
  "merchant_note": "<string>"
}
'

{
  "id": "<string>",
  "refundReference": "<string>",
  "amount": "<string>",
  "currency": "<string>",
  "domain": "<string>",
  "channel": "<string>",
  "merchantNote": "<string>",
  "customerNote": "<string>",
  "status": "<string>",
  "transactionReference": "<string>",
  "createdAt": "<string>",
  "updatedAt": "<string>"
}