Poor service from cartrack

I wanted a very specific tracking device to be installed in my car after explaining to 3 other companies the sales person at cartract ensured me that what I requested was available. I was reminded a few times that the calls are recorded. I was so impressed and asked him again if the package include a panic button because that is what I need and it was confirmed. Then after installation I never received the system that I asked for but was billed a pro rata rate that I rejected. I phoned numerous times for the last 2 weeks and no manager phoned or even attempted to send me an email. I every time asked to be contacted after 16h00 well quess who is phoning....yes the collections department! I refuse to pay that pro rata amount I did not get the product I requested...... go listen to your recordings then phone me or pay me my daily raye and I will come do your job Im now fuming of frustration and expect a senior manager to call me back.