Bad client service

I have a car tracking device with car track company, every time when I call them to test if they're able to locate my car they are unable to. Tonight I called to check since last week Friday they sent a technician to fix it, still it was not working. I spoke to a very rude consultant naledi who was not willing to help instead she just told me she can't locate my car nd I must call tomorrow and speak to a technician about it. What if something happens to my car now nd I am paying every month for a tracking device to ensure that it is secure?? And every time I call their call centre someone promises to call me back nd they never do, even naledi did the very same thing until I called back again after 45minutes and still the lady I spoke to wouldn't locate the position of my car. It makes me wonder if their tracking device works or they are just taking my money for nothing.