Continuous debit orders from Beame after cancelling twice

I have been with Beame tracking for a car I bought in 2015. In March 2018 I received a call to tell me that the device is paid off and that the contract will expire so I need to renew my contract and only pay the service fee per month.

I sold the car in February 2019, and since it is not allowed to transfer a Beame tracker from one vehicle to another, I made a call to cancel the service entirely. Two months gone by, and I still get the debit order for the service. This time Beame phoned me with other promotional ****, and according to them the service is still active, so I asked again to cancel my subscription, to which the operator rep**** that it will be done. Another two months onward and the debit order is still being deducted from my bank account?

I've read other complaints regarding the degree of difficulty just to cancel a service with Beame / MiX Telematics Africa, so apparently this is a thing with them. Why is this the case?? Falsely confirming over the phone TWICE that a service will be canceled without actually doing so! It is blatant *****ing! My account number is 695804