Legal heirs right to deposit remaining amount of auction

Dear members, A bank auctioned a property wherein Mr X declared successful bidder and deposited 25% amount on the same day but he sought extension for depositing 75% which was granted by the bank. Before the expiration of the extended time the bidder expired. Now the widow wants to deposit the remaining 75% amount but the bank is not accepting it as the bank is saying that the widow cannot deposit the amount and we cannot issue sale certificate to widow or other legal heirs. what should the widow do so that the property can be registered in the name of widow and sale certificate may be issued in her name as she is ready to deposit the remaining amount within time. Please advise thanks in advance Regards SK.