Vodacom, you have 3 days!

I recently received a call from an agent to advise me that the Vodacom data and per second billing rates have dropped. They offered to migrate my contract from a 2GB contract to a 6GB contract at a saving from R800-odd to R700-odd a month, to which I agreed. Upon visiting my Vodacom app, I discovered to my absolute shock that my bill had in fact increased by nearly R400pm! Even my handheld device charge went up - for WHAT?! I was on the line now for 28mins to the call Centre to have this reversed and was told this can only be done in 3 months. This is **************** and absolute nonsense - you are NOT treating your customers fairly by not telling them the final outcome and financial implication of accepting you call-centre offers. I am a LONG standing client of Vodacom and will NOT be taken for a fool. If my query is not resolved by Friday as advised, I will cancel everything with you and make sure every contact person I know is aware of this *******! I even got billed R6.99 to settle the account in the event of my death. Maybe you anticipated the heart attack I was about to have when I got my next bill?! I DID NOT SIGN UP FOR THAT! This is just ridiculous Vodacom...absolutely ridiculous.