Open a return case stating damaged in transit.
If this was a Simple Delivery item you will not need to send the item back and eBay will refund you.
If not a SD transaction, if the seller wants their item back first before refunding, they need to pay for the tracked return postage. I
If they don't, and 3 days pass with no refund to label for the return, you need to escalate the case to eBay, they step in and force the refund.
@incredible_how