New Cellphone Contract - No Delivery and Disconnec

I called MTN Corporate call center a on 1 February 2015 and placed a new cellphone contract. Reason for taking the contract with them was, I would get a discount on the contract based on the company I work for. I was on the Vodacom Network prior to this contract being placed. I was told that the delivery of the phone together will sim card would take approximately 5-7 working days. I was also promised that they would only port my number to the MTN network only after I received the phone and new sim card. On Friday evening 12 February 2016 i was disconnected from the Vodacom network but I still did not receive the new phone or the new sim card therefore i was not contactable. Due the nature and the role I play in my work it was essential I have a phone to be contacted on as I am an emergency adviser to many employees this over and above my personal communication that i need to have eg. Alarmed response reaction to my house, Family and Friend communication etc. I have called MTN twice today, 15 February 2016 and left messages for the supervisor of the call center to get into contact with me, this hasn't happened yet. This behaviour/experience is not acceptable. I am disgusted