Complete Power Failure after device has been installed.

In the beginning I had a lot of issues getting Cartrack to come and install the tracking devices. After numerous phone calls and previously posting a review to get my devices installed into both my vechiles, the devices was eventually installed. After installing the devices, one of my vechiles started to have power failure and starting to happen more often, this was never a problem before the device got installed, needless to say the installation took the technician 4 hours to install, covers are broken and loose. A complete power failure took place last week Friday morning, after consultants promised to escalate this matter and that someone will phone me the very same day, I contacted Cartrack myself yesterday to report the problem again, they said that they will have to log a ticket with a specific department and that they will get back to me within the hour, and no one contacted me yet. As this vehicle are being used to drive far and is not always available I'm playing against time and this service is really ridiculous, and very unsafe for myself as I am a pregnant and can you just imagine what will happen if the vehicle does not recover from the power failure, as this has been happening more often this is really becoming a big concern for me and Cartrack just does not care about client service at all. I also wanted to upgrade my package as the current device works with cell phone towers, which is not reliable with the loadshedding and cloudy weather, I got told hold the line and that the consultant will have a look if I qualify. I NEED THIS MATTER SOLVED BY LATEST WEDNESDAY 14 DEC 2022 and my device installed and ready to drive WITHOUT ANY POWER FAILURES!!!