some sellers are a bit stupid and dont realise that when you are selling and buying on ebay, you are playing by the rulebook just as you are if buying from a shop.
Under a certain sales of good act , if the item isnt as described, eBay will back you.
good luck mate.
PS: if its a diesel you got, i have a highline cluster thats coming out my car soon, Will be up for sale on here so keep an eye out if interested.