Pure utter bul%&#t

I've been with Netstar for a couple of years and never had any issues and this was a recommendation from my late dad who has been a client from 1996. 3 weeks back I bought a new car and requested assistance to install a Nano, when the technician came through, he did as instructed by the CIC where they told him to fit an Early Warning and Nano (Mind you, my request is only a Nano). When I called in to verify what was done, 1 of my vehicles was removed and only the new car appears with the old other car I always had instead of 3 cars all fitted with a Nano and only 1 had an Early Warning. I've been taken back and forth to get this resolved as they keep scheduling me for installation, all these cars already units in them and I've been paying annually for the other 2. I refuse paying anything extra for all these up and downs they want me to do as I use a bus to travel to work simply because I'm avoiding the unnecessary mileage on the cars. To this day, I keep getting a call for new fitment and it doesn't make sense to me as it's not my fault the agent was only chasing his sales target and not follow my request.