No use after 6 days, calls, and physical visits

Hi<br> <br> I upgraded last week Friday morning.<br> I was told that it will take about 2 hours for the old sim to be de-activated and the new to be activated.<br> Nothing happened by Monday morning, except the SMS's that I received on Friday telling me the upgrade is done.<br> I phoned the call centre on Monday. The told me to call the store. I did. They told me the upgrade failed but the person have fixed it so I must now give it 2 hours.<br> I visited the MTN store on Tuesday morning. The lady told me it will take 2 hours.<br> It is now Wednesday morning. No Change.<br>