ULTIMATE SERVICE FAILURES BY CARTRACK

I took out a tracking unit with Cartrack for R 199.00 per month, early this year. Since day one, they have been debiting the incorrect amounts, running 3 * debits on my account, instead of 1. I asked for them to email me a report on the whereabouts of the vehicle, to date I have not received it. They did not inform me of the changes in my premium, my debit order date is the 20th of every month, they run the debit on the 18th, I then get charged fees for returned debits by my bank, as I made an agreement for 1 debit, but they are making 3.Any normal person after experiencing all of this, would no longer want to be a part of this organisation, and I as well told them to call me to cancel this, now they say I need to pay R 1 700.00 for cancelling? After all those Service failures, and terrible service, I now have to pay R 1 700.00?