Bought a coat on eBay a fortnight ago , hadn't received the item by this weekend so opened a case .
Seller at first agreed to a partial refund but is now saying she has proof that the item has been received as she said she has spoke to the post office and they can confirm they delivered it to my house 
I've checked the back garden in case it was thrown over & have asked the neighbours but no sign of it .
Item was not sent recorded just plain 2nd class .
I'm not sure what to do , I have asked to see the proof but she is demanding I close the case 