Bad SERVICE Provider

In October I went to MTN Centurion Mall to do a simswap and paid for the SIMSWAP and GUESSS WHAT ???!!! The sim card is still not active in December WHICH IS 3 months later , I have been to the store multiple times and called the call centre a zillion times, NO ONE SEEMS TO KNOW WHAT THE PROBLEM IS YET I AM MAKING MONTHLY PAYMENTS TO MTN. WHY IS SUCH A BIG CORPORATE SUCH AS MTN *****ING FROM THE POOR? Are your staff not adequately trained to serve and advise customers , WHY is there confilicting information between the call centre and the store ? STAY AWAY FROM MTN, 3 MONTHS OF PAYMENT AND STILL NO SERVICE