Bad service

I'm so dissapointed in Vodacom as their contract customer. I had a situation where their consultant misinformed me regarding services which resulted in me losing some benefits I had added to my account and they promised that they would resolve it but it's been two months now. I've called them twice already and all I get is empty promises, their staff never get back to me like they say they would when I call them. I don't understand what's so difficult with taking responsibility because they have the call recordings where they can clearly hear that I was misinformed.