MTN goodbye to the future

Where is the service , why all the lies ?? I did an upgrade with MTN on Tuesday the 3rd of May, after doing the upgrade and excited to use my new phone the sales assistant at Sandton City said that they cannot do a sim swop as it is after 6pm even though they work until 8??? The story continues when I went to the MTN Allandale on the 4th to assist me with the sim swop and I was inform that it will take 2 – 24hours for this to be activated. On the 5th of May at 13:00 I switched on the phone and with a surprise there was no network nothing as the sim swop was not done, now the frustration and phone calls started. I have phoned roughly 20 times and every time getting a different number to call and sort it out, eventually I got confirmation around 4pm that the sim swop was performed and done but the sim card is not active. I phoned the sim activation department more than 10 times and got through to a consultant, after speaking with him he promised me that my phone will be activated before 1pm as they are working on the problem. It is now the 6th of May and still no progress and willing assistance, im asking myself after roughly 15years of being a customer of MTN if it is still worth it ?