>>8240387
>>8240467
Sorry, I guess this isn't helpful to you, I just have a similar story to share.
This happened to me once, but the parcel was returned a few months after I'd sent it out (international sale). I contacted the buyer and even left a comment publicly on her own lj, thinking one of her friends would at least see it and tell her, but she didn't respond.
At that time an anon on cgl told me that the best course was to refund the girl but give her neutral feedback as it wasn't my fault that the buyer wasn't responding when I was trying to resolve an issue. I really did not want to resend a parcel out into the unknown and then have a crying buyer on my hands when it doesn't arrive.
Then New Years' and some family trips happened, and I forgot all about the package, I'd already decided to refund her and put the dress back up for sale but forgot to actually do it. Out of the blue, two months after I had tried to contact her, she finally contacts me, gives me a different address and paid for shipping again since it wasn't my fault.
In my case I write in my terms that I will only ship to the paypal address, though, so if the buyer wanted me to ship to a different address I would have refused the sale, or refunded them and sent another invoice. The long shipping time also meant that the paypal protection had already lapsed by the time I got the bounced parcel.
Hopefully your buyer responds to you soon.