My company is a material supplier. There was a disagreement over the intent of the drawings, approved submittals, and the job site conditions had changed. They expected our firm to make field modifications to the door frames at no additional cost. We had an approved submittal stating what size the frames were to be. We made the modifications, and they back charged our firm for the amount of additional labor required by their firm to install the frames and hardware. We were only a material supplier. We finally agreed after six months to accept a back charge to a least get part of our retainer returned to us. We signed the change order to allow the final retainer to be paid. After the agreement it has been sixty days and we still have not seen the retainer.