Contract mess up again

I recently received a call to save on my contract bundle. I accepted to have my contract decreased. It is now been messed up again by Vodacom and the amount has doubled. It is even more than what my initial payment was. The whole thing was completely messed up including data and call time. This is unacceptable and I am furious again because it is not loaded properly. I have tried calling and kept being put through or the call dropped in my ear. Utterly bad service and not a service provider worth being with.