Windowdressing - never contacted me

I wrote a complaint regarding a billing problem and on Hello Peter, Vodacom wrote they would immediately solve my problem. A lady sent me an SMS to say she would contact me - Ragmah Stevens, and never did. I have no missed calls or anything. So my billing problem - they never changed my son's phone to his account, despite me coming to see them TWICE - so I am still at a loss what to do. Vodacom pretends to respond only to fool people but never do.