Disappointing service

I am very disappointed at the service I am getting from cartrack. I called last week on Thursday to arrange for a new unit to be fitted in my new car as I have sold the old one but to date, I there is still no unit fitted in my car. I have been calling almost every day. The feedback I get, is that a technician will call me but it has not happened. This is a company I have been with for the past 5 years. Maybe it a sign for me to shop for another tracking company.