Can I sue the roofer?

My husband who does not speak or read English, and he signed a contract with the roofer. After that, he was trying to cancel the contract, he tried to contact them, but the person who sign the contract could not be reached out. 2 weeks later, we received a voice message and telling as that they scheduled the material to be delivered to our house the week after. We then called the Representative right away, and told him to moved out the material delivery date to 8/15, since we were on vacation, and he agreed to. I came back from vacation on 7/21, and received a bill for $17k, which the claim that they sent to the insurance company was only$1,000. I call the customer service, and they told me the person who handled my account has left the company, and there is a new account manager taking care of our case. I called her, and she was rude, and screaming on the phone, and telling me the roof has been replaced on 7/3. She told me that I have to contact my insurance company, otherwise we will have to pay this by ourselves.