Debiting after cancellation

A few years ago, I was one of their clients. After my wife ended her contract with Cartrack, I took out a new one, which ended on January 18, 2014. We were shocked to learn that Cartrack had been taking money out of my wife's account after her contract ended. We had been paying for the same car for more than 4 years when a woman called to report our problem, and we haven't heard back since.