Tracker ****s people with debits

I have been trying to cancel my subscription with Tracker since March. The call centre agents never pick up, and eventually when they did, a lady by the name of Vuyani assisted me and escalated the request for cancellation. However, I kept getting calls that my vehicle is spotted in unsafe areas to which I responded that the unit has been requested to be cancelled together with the subscription as the vehicle was sold. The calls for tracking the vehicle have indeed stopped, but not the debits on my account. Tracker accounts department keeps taking my money when I have made my request very clear on numerous occasions.