Have I been a victim of fraud and material misrepresentation?

Question Details: I had a building insurance claim recently; I already had a builder. The insurance company brought an appraiser to the inspection. The appraiser convinced me to use him for part of the job, arguing that more would be covered by using him. He said I could continue with my current builder also. He kicked my builder off the job, caused huge delays to the urgent natured repair, did very little actually work, waited on the insurance check to be issued. My builders had the job almost completed when this appraiser installed a lock box to prevent them from completing works. This appraiser demanded I give him the check proceeds plus my deductible so he may handle the final stages of my claim, which I discovered was in fact closed, deductible subtracted. He sent a bill for $8543 for 2 days drywall work and is demanding I pay this by Wednesday. He never sent me an estimate for works. I already paid the bulk of the insurance proceeds to my builder who actually did the job. Does this guy have a case against me?

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