Contract not activated

Received a text message to upgrade my contract.Went into MTN store at Canal Walk for upgrade on current contract.Were advised that sim swop will be completed within 24-48 hours. After 48 hours, still not activated.Went back to store again on 07/08 to enquire about this and were told by the store manager that it was a network fault, but that they were offline and would email through all correspondence. It is now 2 days later again and still no email or any communication from MTN. This has been a very unpleasant and frustrating experience.