Paying for nothing

I have a tracker device installed in my car for over a year now & my last unit testing notification was in May 2014 & i therefore called the call centre on the first week of March 2015 regarding my unit testing and advised them that i haven't got any notification on the testing to say it's working or not as they are supposed to.To my suprise the response i got is that i am responsible for making sure that the unit is tested and in working condition but yet i don't remind them abt debiting my bank account on a monthly basis.I was therefore put through to the lady by the name of Lungile who said she will put thru a request for the test which would take 3 working days,thereafter enquired about the other devices that they have to see which one is going to MAYBE work better than the one i currently have,& she gave me the other ones they have & said she will have one of the sales consultant contacting (which did not mean that i wanted the current unit i have fitted not tested).Today i called again to find out abt the testing and Lungile tells me that she did not request for the testing to be done on the current unit i have since i also asked abt the other units! I want to cancel NOW!!!