Abused service.

Last year I told cartrack people that I wont manage to pay my debit order anymore because of my difficult financial issues and that the car its being used by someone else .The consultant told me that im required to pay R2000 cancellation fee,when I took the tracker I started to pay 99 then it went to 270 and was never told that if i wanna cancel it I will be required to pay R2000 now im unable to pay and im in arrears.I am being called and abused everyday even on Sundays.If I was told about cancellation fees I would have never taken it .My bank account its on minus now because of cartrack this is frustrating for me .