Technician lied about my appointment

I was given an appointment last week and the technician lied n told the company that I wasn't available.  I saw the truck when it passed my house because I was sitting outside waiting for the technician. I had a double knee replacement and thought I'd wait outside for him to arrive. He passed the house n kept on going. The next thing I knew was that I was receiving a notification saying that my appointment was canceled because I wasn't available.  I was sitting outside. He never came to my address...he just passed my house. What kind of stuff is that. He lied n told the company that I wasn't available. If they let this guy get away with this...I want to work for Xfinity. He needs to have a truthful answer for myself and the company. The rep said that our wiring needed to be checked n our boxes may be old since we have had them for a while. I want to hear back from this company.  I pay close to $200 monthly for my service n can't see the television picture because of the pixilating. I can't tell u how many times that we've called Xfinity n they've done troubleshooting...its still not working. Please reply. Thank you.