MTN Cornubia - my new contract sim card is not working 2 full days now!!

I went to pick up my new contract cellphone on Wednesday the 11th of October. I did a port and was told to use my old SIM card until it loses signal, then insert the new SIM card. Consultant name is Justin. The SIM card did not work. I could not make calls nor had any data. Next day I went back and was told by Cheney that the new SIM card was not activated. She said I should give it 24 hours. She said to call her today which I did numerous times, no answer. Then I called the landline and asked for the manager. He proceeded to say he will check and call me back. It is now 6pm (their closing time) and I still have not got an answer and I have a phone that I cannot use. I called again numerous times after speaking to the manager and got no answer. I am absolutely disheartened as I am sitting with a phone that I cannot use on a weekend that I am planning a big function. Your staff has proved to be absolutely *********** and they have left a very poor taste in my mouth. I need someone to contact me ASAP! My number is ***.