Raiders, watch what you say and about whom please. Your paypal claim was rightly refused, you acknowledge something was sent and the only person who cannot prove they did what they say is you.
Royal mail MAY have f*cked up but it certainly wasn't the way you're implying. You were made offers which were more than fair at that time and this is no fault of the seller as he fulfilled HIS end of the contract and is more than able to prove it. Something tells me all is not what it seems with you.
I don't need much encouragement to ban people, normally I don't even give the courtesy of forewarning.