stop *****ing my money

Im beyond frustrated... my day always get ruined by a call from Cartrack. so 2 years ago i bought a bakkie. and now last month all of a sudden i have cartrack fee coming off my account. i didnt sign up for this and im not going to pay for a service i didnt sign up for. now im being harassed and threatened with lawyers and blacklisted. the people that is calling me are rude. which make me being not to friendly to them either. you can imagine my frustration. every day i get a call to explain the same story to just another person that calls me. i understand that everyone is battling at the moment with their business..but just deducting money off potential clients bank accounts is not right. i call that *****ing! so stop *****ing my money. and just take my name off your system. i didnt sign up for this service and when i tell you guys that i dont want this service it just falls on death ears. i will never ever deal with a company that treats their customers like this.