Contract Cancellation Policy

I have just had to make a payment under duress. I phoned Cartrack in June 2018, requesting closure of my account, paid the outstanding amount and never received any other communication about further actions needed. I sold the car in question. So, I assumed that the contract was cIosed. I was later told that I was phoned but I am in meetings most days and no voice message was ever left. Never was an email sent or voice message left that I should contact someone. Only after my bill amounted to more than R1000 was I contacted, this time voice messages were left and I contacted Cartrack. Again, I was not supp**** with the correct information and only later was I told that a two-step approach is followed. In the meantime they continued to bill me and I was also threatened to be handed over. I only received an email after my bill amounted to a substantial amount. I will never recommend Cartrack to anyone, I feel done in and treated unfairly. I feel that their process is not transparent and aimed milking clients.