how to get refunded transactions details using payflow pro api php

I have integrated Payflow pro payment gateway into my php application and processing payment requests using Payflow as payment gateway.

I need to retrieve transaction history which includes refunds too for specific profile ID.

Below is the code that I am using: ref - (https://github.com/rcastera/Paypal-PayFlow-API-Wrapper-Class).

require_once(__DIR__.'/Class.PayFlow.php');

$PayFlowAuth = new PayFlow($Vendor, $Partner, $User, $Password, 'single');
$PayFlowAuth->setTransactionType('R');
$PayFlowAuth->setProfileAction('I');
$PayFlowAuth->setCustomField('ORIGPROFILEID', 'RP0000000XYZ' );
$PayFlowAuth->setCustomField('PAYMENTHISTORY', 'Y' );
$PayFlowAuth->setEnvironment('live');
$PayFlowAuth->processTransaction();

$response = $PayFlowAuth->getResponse();
echo '<pre>';
print_r($response);

I get below response:

Array
  (
      [RESULT] => 0
      [RPREF] => RHX51F5D3XYZ
      [PROFILEID] => RP0000000XYZ
      [P_PNREF1] => BK0P6E1C2XYZ
      [P_TRANSTIME1] => 19-Jun-19  04:42 AM
      [P_RESULT1] => 0
      [P_TENDER1] => C
      [P_AMT1] => 30.00
      [P_TRANSTATE1] => 8
      [P_PNREF2] => BK0P6EB8DXYZ
      [P_TRANSTIME2] => 21-Jul-19  04:44 AM
      [P_RESULT2] => 12
      [P_TENDER2] => C
      [P_AMT2] => 30.00
      [P_TRANSTATE2] => 1
      [P_PNREF3] => BR0P6482FXYZ
      [P_TRANSTIME3] => 19-Aug-19  04:52 AM
      [P_RESULT3] => 0
      [P_TENDER3] => C
      [P_AMT3] => 30.00
      [P_TRANSTATE3] => 8
  )

However it does not include refunded transaction. When I search in paypal manager, I can see these 3 transactions along with 1 refund transaction too. I tried changing TRXTYPE to C (credit) but it gives the error: Invalid tender

So I am looking for any such parameter change where I can retrieve refunded transaction history or may be any method in payflow pro api.

At the end asked paypal support and they replied.

unfortunately, there is no API to get refunded transactions. I'll contact our engineers for possible feature request. I apologize for the inconvenience.