Misleading information given

Im unhappy with how Tracker is treating me as a customer.when I bought my car I decided to take tracker nd then we agreed that i pay R200 but to my surprise the money kept on increasing and I just overlooked it but then it continued till i saw myself paying R400 on tracker then I called them to ask why and they said they told me on the first day tht it will increase like that then I asked for the recordings of the first day i called and they couldnt provide me with proof instead they send recordings of other days whn i called them and i asked them to cancel my account with them they refused and the handed me over and Im really angry because they gave me misleading information and they said to me all call are recorded and will be made available on request bt they failed to provide me with that becaused they never told me. This tracker company is ******** their customers . Up until today no one can prove that i was told that.