UPGRADE PROBLEMS

I did a recent upgrade and had the same issue with my previous upgrade. When I received the information regarding my new contract via email it was a lot more that I had to pay extra per month than what I agreed upon with the upgrade consultant. I also told the consultant I receive 1G of data a month and would like it included again on my new contract term, he said that he will include it on my new contract. Upon receiving the new information he included 1G of Whatsapp data and I am paying extra for this. I phoned Vodacom to try and sort it out and the consultant that did my upgrade was supposed to phone me back, I still have not received any communication from Vodacom. If this was once of I would understand but had issues with my previous upgrade as well.