Vodacom sim swop disaster

On last week Wednesday, I had to do a simple sim swop after I upgraded my phone. I was assured that it would take between 24 and 48 hours for the sim to be activated. It is now Monday afternoon and my phone has still not been activated! After phoning numerous times all I am told is that they're sorry, they're either currently busy with other clients or that 'their systems are down' again. This is completely unacceptable, I have now been without a phone for more than 5 days and as a result I'm losing business.