curl --request POST \
  --url https://api.sand.getivy.de/api/service/merchant/payment/refund/batch \
  --header 'Content-Type: application/json' \
  --header 'X-Ivy-Api-Key: <api-key>' \
  --data '{
  "requestedRefunds": [
    {
      "orderId": "<any>",
      "referenceId": "<string>",
      "amount": 123,
      "description": "<string>",
      "email": "jsmith@example.com",
      "displayedPaymentReference": "<string>"
    }
  ]
}'

{
  "requestedRefunds": [
    {
      "error": "<string>",
      "orderId": "<any>",
      "refundStatus": "pending",
      "orderStatus": "failed",
      "referenceId": "<string>"
    }
  ]
}