203k scope of work

Wow. What do you do when a 203k borrower ignors your work write up and thinks they have all that money to do whatever they want to do. That is the call I had today. What a nightmare. Contractors were given different instructions by the borrower that contridicted the job specs which clearly describes the 'scope of work'. You have to go back to the contracts that were signed by the borrower and contractor that specifically forbid that action. The draw inspection can only be for the items on the draw request. Those additional items must be paid for by the borrower out of their pocket or.... the big OR. What happens from this point? Any suggestions. I'm going to hold off telling you the solution until I hear from some of you.... What could be done to pay for the work that wasn't authorized? Anyone out there?