How to take an angry customer to disgust 101

Having been irritated with service and broken promises with Vodacom, I wrote a report on this website.<br> A customer care lady called and offered to \see if she can rectify the damage". I initially agreed as I had been a client of Vodacom since the 1990's.<br> I was given a phone number and followed up 2x. No action.<br> I eventually just called your customer service and tried to cancel my account. Needless to say"