Struggling to cancel contract

I tried contacting tracker through their online fillup form, still no response. I cancelled my contract on 23rd November 2015 at Tracker offices in Bloemfontein, tracker continued to debit my account to date which I reversed payments. When applying for bond I realised that my credit score dropped and i am 60days in arrears. They called me 23 March 2016 and told me i owe them R735 which i told them i dont have a contract, which they told me the contract was never cancelled and said someone else will contact me to cancel the contract.<br> <br> My contract is way past 3yrs (which now runs on a month to month basis) and dont owe them, pls remove the listing on my credit profile. I am prepared to fight this in court or even call speakout or ombuds if this is not resolved within 7 days.<br>