********** service from tracker

I have had my tracking unit in both my vehicles for many years and have never had any issues but since beginning last month a salesperson from tracker phoned my husband in an attempt to sell a knew product to him he told the person no but they still added it to our contract. I phoned them to cancel and what a struggle I have had now they changed my debit order that has been standing for years to cash I have phoned so many times I have spoken to a supervisor on my last call and still have not sorted out my problems I am tired of phoning them and explaining every time there is also something wrong with my tracking unit in my car and I have logged a call for that as well they say a technician will phone me it has been more than 2weeks nobody from tracker has phoned me yet.