ITEMISED BILL DO NOT TIE UP TO STATEMENT

I received notification as per normal regarding my debit order at the end of December 2015. Upon further investigation with the Vodacom Customer Care Service, I then requested an itemised bill. Whilst perusing the itemised bill , I noticed that none of the figures tied up to what was reflected on my Statement for the same period. I then called Vodacom again for further clarity, but none of the assistants were able to help with any answers. Vodacom always seems to have a 'slow' system or there services are down? this from a Parastatal?... I am finding it harder to remain loyal to a company that provides so many 'smoke and mirrors' to their clients. Surely a simple question relating to a difference in figures on your itemised bill and statement should provide a pretty straightforward answer? Now I have been promised that a call wall be logged, even though the assistant can see that what I am requesting makes sense? Vodacom boasts millions of users, surely this is **************** if we do not query our accounts?