You need to send the DEALERFLAME card from the address
bc1qhsv25cnt5fev03ltx8ethf8hz4fc93c4q8ntnw
to address
bc1q89qwadetgp6egaernyh2ranjn3z37jwnuhfy3c
He doesn't need to do anything. YOU need to refund him.
to send a message from the address
bc1qhsv25cnt5fev03ltx8ethf8hz4fc93c4q8ntnw
need to pay a fees.
This address only 2 transactions. User did not send any messages from this address.
"Pay a fees"... What are you talking about? He clearly did sign a message from that address:
bc1qhsv25cnt5fev03ltx8ethf8hz4fc93c4q8ntnw
Message:
Error send
Sig:
KEWrHLk4wvuqStiDF7NT2mbGl3nngJQasAzPx4S2ba0NG53g5ifYmzzDSyUNzuisnlymYyeYZJ7KuL6 SmC1u2Lc=

You got lucky with a big score but the honorable thing to do would be to issue the refund.