unhappy customer with 6 accounts

I was not happy with my billing on one of my 6accounts with vodacom.i have been with them a very long time and have some big business accounts ( red advantage).i have tried to sort out this account since the 20 jan 2015 with no sucess.i have spoken to so many people at customer service.i requested in my emails which i have sent 7 times for a senior accounts person to contact me.i was promised they would but im still waiting.<br> iv been to my vodacom shop also but no sucess.i even threated to take my accounts away to another service provider and still no response.THEY HAVE NOW SUSPENDED MY ACCOUNT.HELP HELP HELP