We are having an issue with a micromanaging Owner who is not wanting to pay us for a completed job. I am needing to put in an authorized change order to end any future work with them but they refuse to sign it. They are video recording me, measuring, calling the police, and counting up materials saying we owe them money for materials. We are a fixed rate contract and they agreed to pay the fixed amount but are saying we didn't buy the materials"in good faith" even though we did. They are trying to nickel and dime us for everything and our current contract States if they breach the contract then the owner is liable for any of our legal obligations so now they are trying to have me breach the contract so they can sue us Without them bei g held liable for our legal obligations. How can we go about this so they are held liable?