SIM SWOP, PATHETIC SERVICE FROM BUSINESS DEPARTMENT

I have been trying to do a sim swop with Vodacom for the past 3 days approaching 4 days now and still not done!!!!! I have been calling the business department over and over and been **** to and not helped at all!!!! My phone is not working due to the sim that stopped working on its own randomly and it’s now become my fault!!!!! This is a business line and they cannot help me with my sim swop, I have done it in a store twice and been told over and over to go back to the store or send a letter head for them to help but still no help been provided!!!!! I feel this is pathetic service from Vodacom not the store as they have tried everything they can to help. I NEED MY SIM CARD FIXED!!!!!!!!