Unauthorised Debit

I installed a chase tracking device and I was offered support services such as society, fines cure, and accident cure which I politely declined. They proceeded to debit the money which added up R255. I called and told them I don't need the services and I have previously declined. I spoke to one of the call centre agents who told me she would look into it but never provided feedback. I then sent numerous emails to which the rep**** that my query has been resolved yet I have had no refund or even a phone call from these people. They are rude on the phone and they pester people when they want a client. I WANT MY MONEY BACK and I WILL BE CANCELLING MY CONTRACT if I don't hear back from you.