Bad Services

My husband I bought new phones, we called mtn on the 21/10/15 to do sim swaps as the new phone require a nano sim, we were told to wait for 24hrs, 24hrs later 22/10/15 I called and the consultant at the call centre told me I have to wait for 24hrs my request is still on a que, I asked to speak to a supervisor, I spoke to Mr Charles Gumede, he was very helpful he managed to help me within 5min, my sim swap was done, My husband is a very busy businessman he couldn't call when the 24hrs lapsed, he call in the evening, he was told to wait another 24hrs, 48hrs after the initial request was done, we called the call centre, he spoke to Wendy Londe, who spend time not listening,she said she will put another request, we asked to speak to a manager, she said all managers/team leaders are busy, my husband told her he will wait, she then said we are blocking the calls coming in, her manager will call within 4hrs, that was around 11p, does it mean we must wait for a call till 3am, all we want is to change from micro to namo sim, its been 2day now, can someone help us....