Tracker is a ******* and have ****** my money

I cancelled my vehicle insurance in august on my vehicle which was sold , and got insurance on my new vehicle tracker contacted me to install a new unit in my new vehicle , i advised that the delivery of the new vehicle was delayed and requested the old units debit be cancelled however , thinking that an institution like tracker would be honest enough to do it and did not check my bank statement since only to find out yesterday upon looking at my statement for the first time since august that they have still continued debiting me R129 pm every month up unitl this month<br> please resolve this asap and refund my money as you debited me for a service i requested to have cancelled.<br>