Terrible Service

Terrible service. I've used them for years without issue but this last year has been unbelievable! I've been struggling for over a month to get them to fix trackers that have been installed. I scream and shout and then suddenly they get an installer out to replace the units that they just put in and then it still doesn't work. I get another unit installed on a different vehicle which doesn't work either. This is beyond pathetic! Three brand new units and all three aren't working but I must still pay.