All your auctions end in under a few hours so you cannot end the auction now.
You can cancel bids, but you'll need to watch the auction(s) to the very last second as most bids do come in the dying minutes, even seconds of an auction.
Cancel bids here:
http://offer.ebay.co.uk/ws/eBayISAPI.dll?CancelBidShow
If it should sell with a winning bidder, all you can do is to send the winning bidder your reason for not selling the item, hopefully they'll understand, then cancelling the order citing Buyer Requests to Cancel will not give you that damaging defect on your account.
@mbcc101261
