Pathetic service from supervisor

Hi there, I logged onto the vodacom online chat service to find out more about their sim only 2gig contract services and to find out how I could have my 2 prepaid lines converted to such contracts, the one consultant kept asking me questions regarding porting my numbers into the vodacom network though I had advised her from the onset i was already on Vodacom's network then the chat was ended while I was still explaining. Logged on again and spoke to a different consultant who told me she was advised I needed to port my lines.....so I told her the information she was given was incorrect and she advised me to rather phone in which I did and the person I spoke with was unable to answer any of my questions and told me she will confirm the information and phone me back and she never did. So I again phoned in and spoke to a somewhat clueless consultant who told me not to shout at her when i asked to speak to a supervisor and the \supervisor' came to the phone and promised to investigate and call me back