Poor services

I have been with netstar for the past 3 years and last year I requested for an upgrade where I wanted a tracker that is more advanced was informed it is possible they will take from the money the dealership paid and when it is finished they will call to arrange a debit order going forwad than when the money was finished netstar kept quiet n called a few months later when the installment has pilled up couldnt afford so I waited until I had the lump-sum to pay so they can re activate the tracker on December I paid the full amount through to their debt collector and I was informed they will re activate again I waited till January and I called in again netstar informed me that they didn't receive the funds it's still with the debt collector I sent proof of payment to Nonzwakazi the one responsible for the account at netstar and she didn't bother responding I kept on sending numerous emails and was told it's nonzwakazi that is responsible mind you the tracker is not working on the vehicle when I have paid them, than I called client services and they re activated the tracker but I noticed that the panick button was not working so who ever said it's activated was just brushing me off so I was patient again and I sent an email to Nonzwakazi no response a few days ago I have received a letter stating that I am owing the amount I paid in December so the tracker is still not working on the car now tell me if these people are failing to allocate funds how the hell will they recover a ****** vehicle. I don't want anything to do with you guys and I will not pay any cancellation fees if you try me any further I will take this further