curl --location --request POST 'https://api.freedompay.kz/g2g/refund' \
--form 'pg_merchant_id=""' \
--form 'pg_payment_id=""' \
--form 'pg_amount=""' \
--form 'pg_currency=""' \
--form 'pg_salt=""' \
--form 'pg_sig=""'
<?xml version="1.0" encoding="utf-8"?>
<response>
<pg_payment_id>7777777777</pg_payment_id>
<pg_payment_refund_id>7777777778</pg_payment_refund_id>
<pg_status>ok</pg_status>
<pg_refund_status>success</pg_refund_status>
<pg_salt>YtfwCGiBHsFLpYGk</pg_salt>
<pg_sig>ccee466c01c2332d8a065d6108fd686b</pg_sig>
</response>