People don't use Car Track!!!!!

I have installed the Car track device and is paying for the ...... since January this year suddenly my tracking device is no longer active. When I called them, they conformed there is a fault and have to send out their people to check the device. but this is my issue, I must now pay R600 for them to come out and again pay R600 to fix the fault. Imagine, I must pay for a fault on a device I don't even know where it is and how it looks. Utter *******! I don't want this product anymore as it messed up my battery life also. Can you come and take out your ******* from my car I don't need it.