Pathetic Service / Faulty Unit

I've been a client of Tracker for many many years. I've always only made use of Tracker. However, Its been a year now of fighting and loosing my temper with this bunch of *********** people!! The unit in my vehicle is faulty, every single time I get into my car, it sends a signal and they call. Each and every time I explain the same thing, over and over and over!! The unit is faulty. Each time they say the same, they will send a request to technical to attend. I have called as well to report it. Nothing gets done. On Friday the 14th of April I get an email due to excessive driver alert signals. I reply again and this time I tell them to come and remove the unit from my vehicle and that I am not paying for a cancellation as I am sick and tired now of this pathetic service! This morning I get a call from the cancellation department wanting to cancel the contract and who doesn't know anything about that is going on!! This is so pathetic and I am beyond frustrated!!