Sellers' rights

What do you do when ebay ignores your rights as a seller, decides against you without taking into account your position, refunds the money to the buyer against your protests and despite you putting your case, takes the side opf the buyer with regard to returnign the goods and in the end leaves you out of pocket with the shipping expense and the loss of the item . . . . time to reverse the disproportionate advantage to the buyer . . . .caveat emptor, remember?!!