NO DELIVERY AND CORRESPONDENCE FROM MTN

I upgraded my Phone on the 11 of February 2016 and was promised by Thandeka Ndlovu that I will get the Phone on the 17 February 2016. Till the 04/03/2016 the Phone was not delivered to me and there was no correspondence from MTN and courier company. I called in and was transferred from one person to the other. MTN is claiming that the phone is with RTT and RTT tried to phone me and I was un available, I questioned them if they did not have my company name and address and they said they did. What was the point of MTN/ RTT to call me again? when I gave them all the information? Is that not sufficient enough for RTT to deliver? My point is I have been waiting for the phone and MTN as the person that I was dealing with failed to deliver on time. I just hope someone out there will read my email and actually respond to it because honestly I am very angry.