GOLD SAMSUNG GALAXY NOTE 4

During April 2015 I upgraded my phone to a gold Samsung Galaxy Note 4. It was a limited addition and came with a cover. Subsequently two weeks ago my phone just started to reboot the whole time. I took my phone to a MTN Store and it was booked in. The sales person said they would contact me by the end of last week. I could not phone the store because their number was not available. Eventually I went personally to the store. I was advised that I should get a new phone and that my phone's cover should never of been taken from me. I was also advised to go to another MTN for them to give me a new phone. The next MTN's store disappointed me and I still do not have my phone. They advised that they would talk to there head office because I insisted on a gold phone and they did not know whether I could get same. The staff tell me they will phone me back but they do not and every time I phone I always speak to another person. I pay a massive amount for my contract and I want my gold Samsung galaxy note 4 immediately. I am a business lady and need my note 4. I do not want any other colour I chose this phone because of the colour. I cannot wait any longer. The service from MTN has been bad.