eBay — Iphone 6/refund pending

Address:	625017
Website:	www.ebay.in

I bought a mobile from eBay on 19th of May but the mobile was damaged and hence I requested them to take mobile back and refund money .
Ebay informed that they will come and collect, but they didn't turn up for a long time. After several days of follow up, they asked me to send it to seller by courier and I did the same.
But after two days of delivery, they responded me saying didn’t receive mobile and the box was empty and asked me to provide list of documents related to courier delivery and at the same time seller contacted me asking for passcode of mobile which means they received it .
I intimated same to eBay with proof of message conversation between me and seller regarding Passcode between me and seller but eBay didn’t took any action against them and keep on asking me for details.
After this I shared DRS and Proof of dispatch related to courier delivery proof but again they came up with declaration letter from courier office and I sent mail to courier office for the same but they clearly told me that they have only DRS copy and proof of dispatch and which will indicate that courier is delivered properly. I sent the same mail conversation to eBay.
But still sticking into same letter which courier office can't provide .
Finally to conclude, eBay has my money, seller has my mobile and I am left with nothing .
Request you to help since I don’t get any response and moreover it’s a huge amount that I invested.(38, 000/-)