Device doesnt work any longer

I have not had the need to use my Tracker Device since August 2012. I was changing my insurance and needed to have the insurance certificate provided by them. I called the call center to get this document and the service there was good. While speaking to the agent i asked them to test the unit as well. A week later i receive an email stating the unit test failed and they need to send a technician out at a cost of R395. <br> Had i not called them i would never have known the unit doesn't work any longer. If the car had been ****** god forbid, what would i have done as the unit doesnt work. I feel they should send a technician out to look at the unit as it is no fault of mine it no longer works. They have thrown T&Cs in my face with regards to the cost.