Sadly there are thousands of "Non Paying Bidder" claims lodged everyday and it's a long drawn out saga to get your fees back and as "member tiger" stated, by the time you can get on to the underbidder within their system, they've moved on or realised that they got caught up in the moment and bid too much at the time anyway. They'll simply wait until another comes up or have already sourced another or similar.
Cheers,
BB.
