Not getting back to customer

Called MTN on 16th January 2018 to do an upgrade. Was assisted by a consultant named Angelique. According to consultant all wad in order and upgrade was approved. I called in the following week to follow up on upgrade and spoke to diffetent consultant saying Angelique would call me back. Phoned again following day to be sent from pillar to post. Friday 26th phned again spoke again to different consultant to be told the phn i wanted is on back order and again Angelique would call me back. Phoned again today 29th Jan gave my story to be told Angelique would call me back. Finally a consultant transfered me to Angelique, sorry for not getting back to you i will sort out your upgrade before 5. Its end of business and still no call from Ang