Refusal To replace my faulty Phone

I took out 2 mobile contracts with Telkom on the 25th May 2015. I recieved both phones on the same day IPhone 6 Plus. Unfortunately my one Iphone was faulty from the day i opened the box.<br> I went back to Telkom on 29th and the 30th of May to see what they can do.I was told the person doing the mobile phones will be back on Monday. We went back on Monday 1st June 2015 and was told that he's not at work today maybe tomorrow. We eventually got to speak to the store manager who said that my phone must go into IPhone for repairs and that this will take 28 working days. I reffused this as i want it replaced with a new phone in terms of the CPA. They then said i must take the phone to a I store for them to test. I took it to I store in Clearwater mall and they tested it. They gave me a report saying the device is faulty and that it must be replaced. <br> I then went back to Telkom with the report and their answer was it must go in for repairs and that's 28 working days. I told them i'm not having any of that and that i want it replaced as per the CPA and they said they cant as it's an agreement between them and Apple.<br> Why must i settle for a repaired phone when it was never working correctly