Complaint Review: Armstrong Garage Door

I called and got a price from William and he was pleasant until he showed up and said that I had given him the wrong information. He said that he had to go back and get the right parts and then asked if I knew how much gas costs because of "our n****r president". I told him that was inappropriate but he just left. I called his office to report him and cancel but no one answered. He returned about an hour later. It smelled like he had been drinking. I told him that I called and cancelled and he said he didn't get the message and then that I must be a "Obama n***** lover". I told him to leave or I would call the police. He said if I did then I would be sorry. He said that I would be billed for the service call. I just shut the door and locked it. He ponded on my door and screamed profanities at me.