Lies and changes to contract without consent.

I put a contract in place with Vodacom in May this year. I was sold 5 or 6 GB of data 500/600 voice minutes and a whole lot of bulldust. Firstly they didn't follow though with what we had agreed to and I had to call and ask why this was the case. They gave me only 1 GB data and 100 minutes for R1600 per month. They fixed this mistake around July. However couldn't really care that this is a waste of my time following up on their stuff ups. Then I get a call in September, Elite Mobile, another sales lady REF: KHANP 004. They have an amazing deal for me, where they will decrease my sms's and increase my data to 8MB, my minutes to 600 or 700 hundred for only R 20. They will also increase both my daughters data to 3GB and 200 minutes and this bill would reduce so I will be paying slightly less than what I am now which is around R2600. NONE of this was done, in fact my data reduced 1 GB my bill increased to R 3800 and and minutes reduced to 100 without my consent. I have been promised the recorded call by Mandla, I have been promised a resolve by Patrick and lastly Andiswa promised she would get Patrick to call me back next week. I have got NOTHING. Seems like my next step in consumer protection act and cancelling my debit order seen as no one cares.