Matrix Tracker committing ***** I paid fee of cancellation and still they don't cancel

I had a Golf 7 tsi which I sold and contacted Matrix to cancel contract I was told to pay R2700 cancellation fee send it to their cancellation department I was also charged *** for something else . But either they dumb or *********** they still phone me and didn't cancel if they don't cancel my next step is the ombudsman Miosa because I don't know what to do further because these people are committing popia act violation as I can see the travel reports still from vehicle and I would advise no one to join a company like Matrix Beame Tracker