And I offered to do so in the begining but as the emails progressed I looked into this matter. No matter what he states on the listing if an item is not as described or damaged in shipment new eBay policy is that seller is responsible for return shipment.
In spite of negative rants to the contrary, I have found eBay and PayPal have honored their terms and stood by me as a buyer several times.
One case was a vintage Lionel train engine that the seller shipped diagonally in a box that was too small. I photographed the box upon arrival (the damage was apparent) then opened the box and confirmed it was damaged. I attempted to contact the big time seller and his response was I should deal with USPS for the claim. I opened a case with eBay and forty days later had a complete refund. The buyer never contacted me for the return.
Another was having bought a Otterbox, only to discover it was counterfeit. I filed a complaint with documentation to support my conclusion, within hours I had a full refund and shortly after that the big time seller was shut down. Apparently he had other complaints in feedback of selling counterfeit and others had opened claims with eBay.
The most bizarre was having won and item and paid for it; I was surprised to get a refund in PayPay with a message from eBay that they refunded the money because they closed the seller's account because of suspected criminal fraud. He has great feedback and ridiculously low prices; but, his supply chain may have been too hot to handle.
All that said, you have filed your claim. Now, advise eBay that you want to return the item to the seller; but, the seller has not provide a return shipping label and is telling you that return shipping is on you which is a violation of eBat T&Cs. They will take it from there. Once the claim is open, all correspondence should be via eBay and follow eBay's claim instructions. You may be surprised to get a full refund and a notice the case has been closed.
As both a buyer and a seller on eBay; I can tell you eBay usually stands with the buyer. Damaged in shipment policy is fairly clear. When in doubt, eBay's policy trumps the seller's stated terms and conditions.