Contract for Damaged goods

Good day, Peter... My mother was due for an upgrade she offered that she will take the phone for me and i will just continue with the payment, since we were at Maponya mall we decided to just go to the Vodashop. we then got aprooved for the Sony Erricson M2 Aqua on the 24th of May. I was so dissapointed when the Phone did not Switch on again on the 8th of June, I then called the customer care center wher i was adviced that because i bought the phone directly at the shop i would have to return it to them but if i had bought it over the phone they would have been able to give me a new phone since it was just 14days. I then took the phone to Maponya Vodashop on the 9th, to my surprise i got a very cold service from the consultant not even wearing a name tag and did not even give me her name. No apology for the inconvinience, just took the phone to the back and came back with papers to tell me she will call me afer 7days and was not given a phone in the mean time. I was not called in 7 days and i decided to go to the shop on the 24th of June, still no one apologized for not contacting me.In 4 days the phone went off again and they refuse to give me a new phone so i have to pay for this