I am disgusted by their service

Last year August I traded in my car got another one.I called Cartrack regarding the reinstallation but they debited the reinstallation fee since I’ve been waiting for them to install the unit.Their excuse is that they can’t get hold of me but to my surprise when they debited the reinstallation fee they could get hold of me.There’s an alternative number that I gave them because I work underground I don’t have access to my phone I’ve told them this couple of times.It’s over a year now they handed my account to the lawyers they say I should pay the remaining balance I told them I won’t pay for something that I don’t have on my car.I’ve been disputing the money they’ve been debiting.Imagine for a year they can’t get hold of me how possible is that.I even went to their offices In Vanderbijlpark but still no luck even told them I almost got hijacked but don’t give a damn about their consumers safety