Who is the customer? Vodacom does not care.

I moved from KZN to Gauteng in July last year, since then I have been trying to get Vodacom to sort my connection out. I live on an estate in the Northern Suburbs and the connection here is almost zero, the majority of the time my phone wants to connect to MTN or CellC because Vodacom does not exist. I have gone onto the callcenter, I have spoken to senior (at least they tell me they are senior) people at Vodacom. I have met, by coincidence, with a \senior\" Vodacom person, told them my story, they took my business card. Everyone promises some one senior will get hold of me.....not once, has anyone bothered to contact me. My wife's MTN connection works perfectly, so maybe Vodacom has to admit there is no way they are able to help me and release my to go over to MTN. HOW do I get a response from Vodacom, I have given them my landline number (because the cell phone connection does not work 99% of the time). I work from home, this morning I have been informed I have lost out on a large contract because the financial backers could not get through to my phone.....barring physically doing something to a Vodacom manager (guaranteed to get tabloid coverage)....WHAT DO I Do?????"