having difficulty using the second chance procedure, winning bidder didn't pay

I am having difficulty with the second chance procedure, winning bidder didnt pay and has not responded to two communications, i have offered it to second highest bidder, does this cancel the original transaction, it is unclear to me, thanks

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As opening an unpaid case gives buyer 4 more days to pay so it was rather foolish to Offer for sale to someone else.Two buyers one item two lots of selling fees.