Bad customer service

I installed cartrack on Sunday and I was told that my tracker is working I then try and press the panic to see if is working on to find out that it was not workin. I called in to let them know that the devicè was not working i was then told that they will send the technician to come nd fix it, but that technician never came. Worse part im getting calls from thier financial department asking me to pay prorata fee for something that is not working. They only care about getting our money but they don't care about our complains 😔