Terrible Service. Please assist!

Good day,

For the past few weeks ive been back and forth with the cartrack call center with an issue that my mobile app does not detect the tracking device accurately in my vehicle. After I was told on numerous occasions that the issue has been resolved after a reboot, the problem, however, persisted with no solution.

After further inquiries I made I have now been told I need to pay R600 to replace the device as its faulty, I insisted that I can't be responsible for the device replacement cost as I was told it was working furthermore I can in no way damage the device, so if its faulty it must be replaced free of charge.

Please help. Regards