I have signed a contract with a roofer to replace my roof, he told me it's a non-binding and he can not negotiate with insurance without a signed contract, so he insisted, and I signed. We agreed to discuss the final amount after his negotiation with my insurance, After that hebut he never get back to me , but he sent another final contract with new numbers, which I never signed or accepted. All of a sudden, he came to my home with 10 roofers and said as per the appointment, they are scheduled to replace my roof. The appointment was never agreed or accepted , because I did not agree with the final contract he sent me after negotiating with insurance. Now he sent me demand letter, what are my options? The only condition on the initial contract was "First payment due after the material drop", which never happened. No other conditions on the contract. Please advise.