You still haven't answered the most important question of all yet.

When you sell an item, you receive 2 emails, one from eBay, the other from Paypal.

You are supposed to completely ignore the eBay address and post the item to the Paypal address only.

So did you post the item to the name and address which was provided on the Paypal payment advice, or the eBay "congratulations, your item sold" advice?

If you sent it to the address on the Paypal advice, you are covered for Seller Protection and the buyer should not have won the case.

However, if you sent it to the address on the eBay "congratulations, your item sold" advice, you don't have a leg to stand on and you won't be getting your money or your item returned.

So to which listed address did you actually send it?

It's a simple question, and requires only a simple answer.