Terrible service

I recently purchased a new car and requested a DNV (device verification) to be done. On the 5th of August, I was charged R870 for this service. However, on the 8th of August, I received an email stating that my Cartrack app and services had been suspended due to an outstanding balance of R870. I promptly emailed proof of payment and contacted Cartrack multiple times, but I received no response.

On the same day, the 5th of August, I also called to upgrade my plan as advised by my insurance company. I was informed that it would cost R350 to install a new tracker and was told to wait for a call from the scheduling department, which I did. Starting on Tuesday, I began receiving persistent calls from Cartrack demanding payment of the R350. I requested that they debit the amount, which they eventually did two days later. However, I still have not received any communication regarding the scheduling of a technician to install the new tracking device.

I called again on Saturday, the 10th of August, to follow up and was assured that I would receive a call and email before the close of business. It is now 9 PM, and I have received nothing.

What kind of service is Cartrack offering? Despite the money being deducted, I have not received the service I paid for, and now I am stuck with a car that I can barely use. My insurance also requires proof of the new tracker installation to cover the vehicle against loss and theft. What must I do to get an upgrade or any service from Cartrack?