Incorrect billing

<p>I received my tracker as part of the package when i bought my car from Hyundai Wonderboom end of November 2015. I was told that the first billing date will be after 36 months. In December 2015 i realised that the tracker in my car is not an early warning tracker. So I called the dealership and requested that i want to change my tracker to an early warning alarm. In February the early warning system tracker was installed. I was then in formed that the billing date has been moved from 36 months to 15 months due to the upgrade. To my surprise end of February my account was debited with R392.62, I then called Netstar and reported the matter and I was informed that the billing date has been corrected. Again end of March R571.61 was debited in my account, again I then called Netstar and reported the matter and I was informed that the billing date has been corrected. Again end of April R750.60 was debited in my account, again I then called Netstar and reported the matter and I was informed that the billing date has been corrected. 12 May i received a friendy reminder message to pay R750.60 because i have reversed all the debit orders, again I then called Netstar and reported the matter and I was informed that the billing date has been corrected. On the 18 of May i received a call from Netstar finance being remined to pay the R750.60 and the guy who called by the name of Ramu told me that he has no idea about the billing date story, again I then called Netstar and reported the matter and I was informed that the billing date has been corrected and that I must ignore Ramu. On the 21 of May i receive anothe message from consumer credit being reminded to pay.</p> <p> </p> <p>In a nutshell I am tired of being **** every month and i want the matter to be resolved urgently before i start receiveng calls from lawyers threatening me to pay.</p>