Disgusting and appalling service from Vodacom

I've been with Vodacom for 20 years & have remained a loyal customer, but once my contract expires I'm moving to Telkom. I received notification that there is going to be a price increase. For the last month I've called Vodacom making it clear that they're not to take anymore money off my bank account then I signed for - if they do I will see this as theft. I signed a 2 year contract for a certain amount of money and won't pay more - re-negotiation starts once my contract has expired. Monwa Agquonga from the Jhb branch 011 653 500 continually promises to get back to me and he doesn't. It takes me about an hour to get hold of him each time, he cant remember who I am or what my complaint is, which makes me believe that he has done nothing. Yesterday I threated to go to the CEO and he didn't care, if that is the case, what chance does anyone have getting their issues with Vodacom sorted out. ONCE AGAIN, he gave me his word that someone would call me by 2pm, ONCE AGAIN no-one did. This service is frustrating and very disrespectful. If I don't get a response asap and an apology from Monwa I'm moving my contract to MTN and will get my colleagues to do the same. My no is ***.