Although I find foreclosing banks more difficult to deal with than homeowners, it may just take some negotiating to resolve this. The Bank should prefer to close this next week than to have to start the sales process all over again. Possibly a payment to them might resolve things - then go to your lender and see if they will give you a concession on your fees to cover that.
This answer does not constitute legal advice and does not and is not intended to create an attorney-client relationship. The law may vary depending on the state in which you reside. It is intended only to give some direction in which to seek assistance