Cartrack not tracking my car

Car track has not been tracking my car since March 2020. I pay for the service every month and Car track has not bothered to inform me that my device is faulty. When I called in I was told it's my responsibility to call every month to check if my tracker is working. I was then told to pay R600 to fix the faulty device. If I had not checked on the app I would have never known that my tracker is offline. I then lodged a complaint on LinkedIn and it was ignored. From hereon I will be in contact with the consumer ombudsman. I want to be compensated for all the months that I paid and my tracker device was offline. I have the proof to show this.