no one can help me with an upgrade

I VIISTED THE SANDTON NELSON MANDELA SQUARE BRANCH ON THE 24 MARCH TO DO AN UPGRADE ON MY CORPORATE PHONE. THE PROCESS IN THE STORE TOOK AN HOUR. THE STAFF WERE NOT KNOWLEDGEABLE AND KEPT CALLING A BUSINESS SUPPORT LINE, THEY WERE DEMOTIVATED AND VERY UNHELPFUL. I WAS TOLD MY SIM SWAP WOULD BE UPGRADED WITHIN 48 HOURS. UP TO DATE, I AM STILL WAITING. THE SIM IS STILL NOT ACTIVATED. AFTER WHICH I WENT TO ROSEBANK BRANCH ON TWO SEPARATE DAYS AND WAS TOLD REPEATEDLY THAT THE SIM IS WRONG BUT THE COMPUTER INDICATES THE SIM SWAP WILL BE DONE SOON. ON THE LAST VISIT, I WAS ASKED TO DRIVE TO SANDTON AND FIND OUT WHAT HAPPENED. I CANNOT COMMUNICATE WITH MY CLIENTS DUE TO THE INEFFICIENCY OF THESE STAFF. I AM HOPING I WILL NOW BE TAKEN SERIOUSLY AND ASSISTED.