mtn refusing to help with faulty phone

Good Day<br> <br> I would like to lodge a complaint against MTN. I upgraded my cellphone contract with them on the 09th of March 2015 and I received the phone on the 11th of March 2015.03.18 When receiving the phone I realized that the phone was faulty and I contacted their call center to report this and I was told that I need to go to the any mtn store for assistance. I went to the store in Quagga Centre Pretoria and when I arrived I was told that they can't help me and that I had to go to the store in Menlyn and I drove there and when I got there I was assited by Thabile Nxumalo who refused to even look at the phone because she said that the box was damaged and that I had removed that sticker on the box. I asked that how was I supposed to open the box because they had placed the sticker on the place that I was supposed to open the box and I explained to her that they call centre agent who sold me the phone did not explain that I should not remove the sticker. I asked her to call the manager at the store because I was not happy with the fact that nobody wanted to help me. The store manager(Jenifer Shela) refused to talk to me. I need a new phone this one is faulty