Vodacom Sucks

First I was waiting for my vouchers since last year October when I signed a new contract. Eventually I asked them to rather cancel my contract as I did not want to deal with an *********** company. They gave me the run around months on end and then eventually asked what they could do to keep me as a customer. I gave them options but to date I haven't heard back from them. The manager promised that he would make it right, but it was just an empty promise. Now when I email Thabo, the Manager at ****arney, he totally ignores my emails. What do I do? Please don't give me a generic response like you guys always do. I want a response with substance and action.