ADT - getting too big to care about existing customers

I accepted a quote for some work. The technicians came 8 days ago to do the work, but at the end when we said that they hadn't completed the work they said they only did what they were told. Since then we've had the salesman back to confirm what still needed to be done and were told the technicians would come back. 5 days later and I've heard nothing. I have tried calling the salesman but have had no response. I have called ADT but they don't seem to have any record of the work that still needs to be done.