Poor service from tracker

I'm really disappointed at the kind of service I received from tracker I just want to cancel my contract after 4 years of being a loyal client to them.

Im June 2020 I bought a new car and traded my old one at Mazda. The old car had tracker and the new car I took I also asked for Mazda to install and cancel my old contract as I no longer had the car in my possession. End of July tracker debited R397. I called them wanting to find out why they deducted so much bo one could tell me up until I told them I had traded in my old car. End of August they still debited the same amount, I've been with consultants on the phone from July till now bo one is able to resolve my query.

Ive asked for a new statement with the grandi10 taken out no one seems to be able to give me the statement.

So my only option now is to cancel.