Being billed since Feb 2015 for un used Explora

In Dec 2014 I received a call from one of your agents who informed me about the promotion you had for R799 for the Explora for two years etc. I agreed to take the offer and every thing was done over the phone. I was told that I would NOT be billed for it until it got installed. I never installed it as we were only supposed to do that once we moved house in May 2015. It was still in the box un used. I was being billed since Feb even until June 2015. To date I have spoken to many of the call center agents who say it's going to be escalated but nothing is being done. I have been calling since March 2015 and to date you have not refunded me for all the months. The Explora was collected by your courier company beginning of May 2015 already. The last call I received was 02/06/2015 to say I would be refunded. You guys owe me about R2500 odd. I am furious that you debit my account with whatever amount you please. That is unacceptable. I have other bills to pay. I am absolutely dissapointed with the incompetence of your employees. \Passing the buck"This has gone on for far too long. check your recordings and it will prove how long I am struggling with this query."""