MATRIX TRACKER CANCELLATION A NIGHTMARE

The WORST Service ever! I got a tracker installed on 27/02/2012. Last year Dec 2018 I was told that there's a need to have a new device installed, and they gave me an appointment for Dec 31st, and i drove to the installer, only to find that the shop was never opened on that day. I called Matrix, they apologized for wasting my petrol and time, and they promised to come to my house on Jan 02nd, 2019, I waited the whole day, they didn't show up. Other 3 consecutive appointments were made, but they never showed up again. I then, due to lack of trust in their services, called them to say I was cancelling their services, of which they agreed. To my dismay, they continued debiting monthly fees from my account. I then decided to reverse the amount every time they debited. Before I knew it, I was called by a debt collector, who in the process of me highlighting my frustration with Matrix, adviced that I pay the amount and attach proof of payment and again request cancellation from Matrix, which I did, this was in May 2019. I insisted to get their response in writing stating that they have cancelled their services. Last week I got a call again from a debt collector again, to collect an amount of R260. I was shocked, now I'm so frustrated because no-one attends to my emails. Phone calls are even a waste of time because each service provider will say that they will enquire, or push me to another agent, at the end there's no solution.

I really need advice as to how to go about this matter. I feel I have exhausted my means of getting the solution out of this Matrix capture.

Please help. Irene Ngobeni