THEFT

Help please. Vodacom is *****ing my money. They sold a new contract to me, said and agreed on the phone it replaces the old contract (I must, and did destroy the old SIM Card) Now they keep on deducting for both contracts. I am paying double now and getting half the service. In store enquiries, hellopeter.com.. asking to call me, numerous emails .. nothing helps. Please tel me what more can I do..? Not all their stores takes enquiries or can assist, sitting for long periods of time on the phone with client services also did not help.