Tracker *****s money from my account. Do NOT deal with them!

For the last few months Tracker has been *****ing money from my account for extra items I did not request. Every month I have to phone and enquire what is happening with my account and then i get promises that it will be sorted out and when I get my next invoice, NOTHING was done. I would strongly advise anybody who is thinking to install a tracking device, NOT to contact Tracker