Still no feedback!!

THIS HAS STILL NOT YET BEEN RESOLVED!! No Feedback, No Product, No Delivery!!! On 10/07/2017 I was contacted by an agent from Mondo, call centre representing MTN stating that I am due for an Upgrade. This was convenient seeing that I had to Upgrade my total package. I accepted the Upgrade + a New Matte Black Iphone 7. The agent that contacted me assured me a speedy delivery. The Upgrade towards my MTN bundle and Contract was done immediately without any problems, but needless to say it is 4 weeks later and I have still not received my New Matte Black Iphone 7. I tried to make contact to find out if everything has been processed as it should have via phone and email, but have never received any response. I have spoken to MTN directly about my concerns but with no luck they only gave me the phone number of Mondo, and when I call I never get any answer and wait forever on the line. When I eventually got an answer from Mondo they confirmed that there was a problem with my GOLD Iphone 7 – I specifically stated that I want a Matte Black Iphone 7, and that everything will need to be cancelled and redone if I want the product I will be paying for!!! This is unacceptable. To this day I have still not received any Iphone 7. One will expect that "professional" company such as MTN will implement better processes to prevent bad service with no feedback. Fact of the matter is that I would like to get my NEW Matte Black Iphone 7 as promised by MTN via the Mondo call centre they utilize. Will MTN and MONDO help me and act as the professional companies they claim to be and solve this problem!!??