[ins0mnia24]

I hope you didn't refund them the money back before you had received the hatchback motor right?? Or do you mean they complained about it not working then you offered to give them a refund and you never heard from them again??
Either way since you were involved in a transaction with them you can go to ebay contact member info then Ebay will provide you with their registered mailing address and phone number.
If you didn't refund them the money back before they you recieved it i wouldnt worry about it then because it must not be that important for the person to get their money back
But i wouldnt give them anything until you have received the hatchback motor back and inspect it before hand also to make sure it was actually the hatchback motor you sent.
I had some one try that on me before i had sold a SLP 88mm Maf and the buyer complained that it didnt work so i told them no problem send it back ad when i had gotten it back they tried sending me a different one then i had sent. And the reason i had known it wasnt the one i sent was prior to mailing out the certain items i would take a razor blade and make the tiniest notch in the most hidden area of the item and i would video it on my sony cyber shot showing the notch then showing the item being packaged for delivery. So i repackaged the Maf with a disk of the video explaining what it was about and why i sent it back , Then i took it to the post office and sent it back as rejected mail saying i didnt order or buy anything from that person and they shipped it back to the person free of charge to me