Very Poor Customer service the last year

I went to Altech Auto page centurion with the booklet of special they print and give out in store, bought 2 phones as per the picture and contract within the book where it stated the BIS is for free, Altech Auto page centurion is charging me since last year as i reported this after the first month with Jane the manager and Vikash, and Hendrik my sales rep, where he admitted loading the contracts wrong or there was a glitch in the system. After getting no results i then went from vikash and hendrik to Jane, To Sue the new manager that said i will get a refund and Now to work with Willy the new manager, after a year still no refund and no apologies just bad experience and bad customer service, no one even phones back when they say they will not even Willy after he knows i want to cancel and what i went through, i phone at least twice a week to follow up myself to hear from the manager willy that the head office or customer service doesnt get back to him, i want this sorted out and my refund and i have my email from the beginning saying i am charged wrongly, i would like to cancel my contracts and someone to phone me asap that is in charge and that can sort this out *** Nicky