Bad Service and False information

I received the worst service ever at Vodacom Contact Centre after having been a loyal customer of more than 10yrs with 4 contracts. I was contacted by Vodacom agent was advised that they are not selling me anything new but because I am a loyal customer of Vodacom, I am getting benefits at no extra cost. I was shocked to be billed more than usual the following month. I contacted Vodacom with this, and they advised that they listen to recording and revert to me, until today the person that was meant to contact me has not do so. I have been billed. I went back to give them a chance to account but I was told that that person is the one who is supposed to call me. I am shocked and disappointed as a result I am cancelling 2 of my contracts this month.