Terrible Customer Service and subquality units fitted.

I have been with cartrack less than a year and I am already on my 3rd faulty device.Because I do not have a secluded and secure place, I went to their fitment centre twice already, first time when I was onboarded as a client and 2nd time when I went to swap out a unit that was sending false alarms. Now they are harassing me for payment yet no one wants to bother to sort out the faulty unit. Not only does this mean I have been paying for a feature I cannot use, but also that I have wasted my time and money visiting their fitment centres only to have faulty units fitted. overall poor service even from the agents I have been in contact with.!