Charged for data that's never delivered

I have recently upgraded my contract and I am shocked by the level of inability by Vodacom to deliver what I have been paying for for the last 2 months. It is almost impossible to get through to the call centre and when I do they are able to tell me what's going on what is going on. I am not receiving data on my account and they are not willing to send me a report of my data usage that they have loaded. I am very dissappointed as it seems they care about me paying my account but not about delivering the service.