Have you synched your clock lately? http://forum.topeleven.com/bugs-tech...-computer.html
Because if the buyer's or seller's clock is not the same as the server's, delays happen, and not just with getting the player. It can be up to a couple hours.
Also if the player was scheduled in a match there might be delay.

If you haven't got him within a few hours of winning the auction, send a request at Nordeus Support