Netstar failed completely to give me a professional service, and is harrasing me

Altech Netstar service and their handling of my case was terrible or despicable for lack of a better word. My story is that I use to have their tracking device for my bakkie which I have sold long time ago. My account number was ***9, and in the first few months they did not deduct their premiums and when I enquired they told me that it is because they were changing systems. Whilst I was still waiting I was then called by a company called CREDITWORX in the year 2014 which is a debt collector saying Netstar said they should collect. Mind you I was still waiting for them to change their systems. I paid the entire account to this company and thereafter I sold my car. I then informed Netstar that the car was sold and gave them the contacts of the new owner who was waiting to take over the premium, but this person was never called by Netstar. Ever since then I have been handed over to more than 5 debt collectors by Netstar trying to recoup the money that I have already paid to the company as indicated above. I have spoken to a number of Netstar officials regarding this case who promised to sort it and until today nothing has been sorted. Even today (10 Dec.2020) I was called by Netstar lawyers and now the money which was paid which was around R800-00 then is now almost to the region of R3 000-00, so they claim These are some of the officials I spoken to at Netstar who failed dismally to resolve my case on landline (011) 207 - 5000/5176 (Rajan on 01/08/2014 and Betty on the same number on the 04/09/2014. I can not even imagine the number of times Netstar debit my account for this money and I had to reverse the money with the bank charging me almost R40 for each reversal. I even have e-mails of their supervisors who promised to resolve my case but also failed to do so. So guys please note my frustration and make good choices regarding your tracking devices. For instance all my cars are now fitted with Cartrack devices and their service so far is excellent.