Feeling conned

I am reporting Trevor White, who works for Strategic Insurance Systems because of a breach of the authorization document sent to me. I do car body repair and had given a customer a quote for just over 40k, which would have been much more costly had she gone else where and this can be verified. Other places would have charged about 60k to maybe 80k. He came to me offering just over 26k and even though I was hesitant, I figured I could make a plan. A lot of work went into this car, as we had to repair big dents on the left rear and left front doors plus replace the left front fender and the left front headlamp plus purchase of paint and spraying etc. . . He wanted me to pay roughly about 12k for the light and about 5k for the fender, which would mean I make virtually nothing considering the work that went into this. It is **************** and ontop of it I had to fill in a cost form on parts purchased and who I got my parts from like it is any of his business. I went out and sourced the parts, made the calls, did all the effort and it is just ****** even though the authorization is approved for just over 26k and instead I am given 15k! ! ! I won't eve do work with these guys again.