Unprofessional, uninterested and rude staff employed at Car-track call center and accounts department.

The tracker device was non-negotiable with the insurance I had on my Polo 1.4 Comfortline. I was initially happy when the service started with the 'No Premium Increase" that was not the case. I was even more at ease due the convenience of monitoring my car 24/7. The actual Car track App was more efficient and updated than individuals selling the device. I sold car on the 05th of July 2023 and contacted and communicated with Fleet that the vehicle was sold, and I requested a settlement amount, cancellation or disconnection of device that was still active on the app as the contract would only end October 2023. I was provided with the amount of R 629,20 that was paid on the 08/07/2023. The fact that I informed Fleet the car was sold, I received a cancellation form via email that was completed and returned. On the 04th of August I received an email containing the confirmation of cancellation, but I am being called, texted and emailed to date requesting an outstanding amount of R130,15 that I owe. The amount of calls I received was high and every person I spoke with said the same thing and I explained the same thing over and over again. It got so bad that calls were dropped or ended by the staff with completing the call. I was being called on Sundays and that is unacceptable. They kind enough to inform you of the operating hours yet I get harassed and sent SMSs that legal action will be taken. Opening line (All Our Calls Are Recorded for Quality and Security purposes) I have requested since the 11th of August that they refer to cancellation form and account paid up and settled. Why am I still receiving calls texts emails for an outstanding amount (that was incorrect apparently) from a staff member? They had and still have all the time to listen in on all the " recorded calls) to understand that the error was made from them, and they should take it up with the person who provided me with the amount I paid to settle and cancel. No, I rather get calls in excess and on Sundays........ When I asked past Sunday why they are calling outside of business hours, the unprofessional lady mumbled something and ended the call. Fleet accounts department is wasting manpower, company time loss of sales due to their inability to backtrack to 11 August 2023, solve and close this case or query. I was patient since August but now this is getting out of hand and the lack of respect the staff has towards clients makes me angry.