User Activity

I have sold a bike and the buyer was completely unresponsive so I esculate to a claim...which takes more than 21 days...since then I have relisted the bike and sold it again .......but ebay still has the dispute open from the sale 3 weeks ago ...lol ...
I mailed it now they claimed it never arrived this is a bad situation looks like I will loose over $500 on this transaction...how can this happen when the buyer chose the option for no tracking...Waiting for paypal dispute to rule in buyers favour .....