Pathetic service after years

A brand new upgrade phone which is still under guarantee has been acting up, after taking it to Vodacom the salesman insisted all they could do was send it for repairs. The phone was sent to Johannesburg. The salesman did not offer me a substitute phone until I had asked explaining that my phone is for business purposes. I was given a terrible phone which was the most standard as possible, which was not even charged. The service was pathetic. He could not remove my memory card and explained that he would have to send it with the phone to which I agreed , the memory card was in tact and upon receiving my phone it was broken and the salesman argued that it was that way when I gave it to him to which I disagree I believe the technicians had broken it and no one wants to own up. Also my phone is still the same and there is no improvement with the technicalities. I have been with Vodacom for over ten years and have never been this disappointed in their customer service. I am paying for the phone which is still under guarantee and the phone is not working adequately due to manufacturing problems and yet the salesman refuses to do anything about it. In the mean time I am losing money.