I need help! Return gone wrong

I recently sold a really expensive lens on EBay, to a US buyer, all seemed good and then 2 weeks after the package was delivered the buyer issued a return request saying the lens was faulty. After issuing the request they didn’t respond to any of my questions to know more about the issue, and eventually just raised a case with EBay. EBay ruled in favour of the buyer, so now I have been charged a full refund for the lens. It’s now been a further two more weeks and I haven’t received the lens. The buyer has not responded to me for over a month now and I don’t think they’re going to send back the lens.

 

so long story short, I’ve lost a lens (that sold for $1,400) and paid over $300 in eBay fees out of pocket for the sale. 

Im trying desperately to resolve this with both the buyer and eBay but nobody is responding (it’s impossible to reach someone that is a human at eBay) I don’t know how I can resolve this.  Can somebody help? 

otherwise I guess I’ll have to go via VCAT.

 

thanks in advance for your help everyone. This has been an incredibly stressful process for me.