So fed up with MTN

I have a new phone and I'm on contract , so bought a new sim card at Mtn World wear and requested a sim swap and I was told that it will take about 2 hours for the connection on the new sim to be activated and that I should keep the phone with old sim card on until my connect is cut off. Nothing happened, the next day I called the call center with no luck , I was transferred from person to person after holding for a call center agent for 30+ minutes, I eventually went back to Mtn World wear . Only then I was told that there might have been a problem with the network and they lodged an inquiry, and they promised that it will take 24 hours max(given reference number: ***). That was on the 21 & 22 July 2015, 5 days later I am still waiting for the sim swap.