NETSTAR incompetence

I traded in my audi and requested to have my NETSTAR tracking device removed from the audi onto my new car two days after I got the new car and they said that would cost about R680 and I informed the dealership that they will be removing the tracking device off the audi and we all agreed, 6 days was the agreed time it will take for all of this to be rectified and a reference number was SMSd to my cell number(CAS-***) for the query. 6 days goes past and no contact from NETSTAR, I call and talk to a guy there and I also ask about cancelling my contract but then he said my contract runs until next year July 2022, so I then continue with the original request to get the device off the audi and continue with what we agreed upon and he also committed to the 6 to 7 days and I made him aware that they are debiting me for a product that is not on my current car so thats also an inconvenience, so 7 days goes past and I grow impatient and I reverse the debit. Today(12 June 2021) debt collectors call me on this lovely saturday to ask me for money forgetting that I have two incidents logged with Netstar to get clarity on getting the device onto my new car. Its sheer incompetence that I informed them TWICE about my intentions to relocate the tracker from one car to the other and now I am being asked for a monthly premium for a product I am not benefitting from khanwhirahalang???