Still waiting for my contract phone for a month

On the 5th of June 2015. I took in my phone Samsung to the MTN in wonderpark, the branch next to Pick not pay. Where management give service to white people. I was given a faulty Samsung and when I took in back they first told me they have to take it to Samsung to be checked. Then after a week I went back using my petrol money and the manager and staff told me that they are on strake and therefore they don't have a driver. I then told them the phone is still under warranty why can't the give me a new phone. Okay another week past then I went again to the store. The manager was sitting in the office as always while I was talking to the staff lady. Then she called the manager. The manage was so rude and was not even sure what was I talking about and to add to this, the contract have dedicated their money. The manager tell me to reverse the money if I want to. MTN IS THIS THE SERVICE YOU GIVE TO A DIFFERENT COLOUR SKIN OTHER THAN WHITE? It is now over a month and I am still waiting for my contract phone. Which you took the money for. This is the poor of the poorest service. POOR, BAD