Conyac で依頼された翻訳結果を公開

I tried calling you on 125-0041, but couldn't get hold of you.

First of all let me rectify what was previously said about refunding the buyer.

Only when a buyer request to return an item and wants a refund for it, must you wait until you receive the item back from the buyer before doing a refund.
In this case the buyer hasn't received the item and wants a refund. I would advise you to rather issue the refund to the buyer as it's not a fault on their side. Just preventing them from filing an A-Z Claim.

Please try to contact the courier company again to find out about the where abouts of your parcel. If the item has gone missing, you can request compensation from the courier company.