Incorrect information given to get me to pay more money

I received a call from Vodacom and the person who called me said vodacom will be saving me money by removing SMS from my contract and giving me more data and minutes. She told me Ill be paying R15 less from what im used to paying. only to find out ill actually be paying way more than what my current contract amount is. what vodacom is doing is very wrong, selling people incorrect information only for them to find themselves in more debt. when I told her Im checking my statement and found that Im actually paying less, she hang up on me. I tried calling vodacom and could not get assistance. Please fix my account as I will not be paying anything over and above what Im currently paying