Vodacom sold me contract under false pretence

Been a customer of Vodacom since 2002. I've been treated badly by Vodacom on a few occasions and have given them a benefit of the doubt when I shouldn't have. In 2014 I called in to cancel contract and was enticed with value added services so that I upgrade my contract instead which I obliged to. The value added services only kicked in that first month despite them being promised for 24 months. I had to endure waste of my time with rude unhelpful customer services personnel. when I tried to cancel contract I was again told the mistake will not happen again and they loaded the services. the next month nothing was loaded and that time around I had enough and requested cancellation of contract without penalties because it was Vodacom 's fault not mine. I was told to send e mail on my request with reasons which I did. the response was that I will be contacted within 24 hours. I have never received any communication and every time I call customer services am told they cant assist because my contract was handed over to complaints department. in the meantime they keep on billing me full amount with no value added services. I just recently stopped my debit order and I am waiting for them.