Poor service from Cartrack!!

I requested my Cartrack to be cancelled around February this year, via an online chat on their website with one of their consultants. I noticed in April, and May, that deductions were still being made from my bank account. When I called Cartrack this week, I was told that I, as the Customer, have to give THEM proof that I requested my Cartrack to be cancelled?? How can a customer supply them proof of an online chat, on THEIR website? I specifically told the consultant on the chat that I am cancelling my Cartrack because of bad service received in the past, and he told me that it will be cancelled. Till this day I have not received confirmation of cancellation, with Cartrack still deducting money from my account. I have now since Tuesday, sent 3 x emails requesting proof of my cancellation. Ticket numbers #***, #*** and #*** have now been generated, but as always no response from Cartrack. Their consultants are rude, and just transfers you from one place to another if they don't want to help you!!