Very poor installation team - bad operations and staff are not trained to deal with customers!

Really badly managed installation team. I wait at least 30min to an hour before my call is answered. The schedulers are never available and you are not allowed to communicate directly with them. They made a commitment to install and never showed up. I I spoke to a consultant named David who had a full on argument with me and told me I’m trying to rush the job and other customers wait longer than a month for installation. He further went on to say that I need to understand that they have internal issues and I should just wait for a call - which never happens!