Vodacom uncaring giant

vodacom the corporate dragon , once again vodacom , I called the call centre late in December 2018 and complained that I had been charged for data even though I had run out of data. I was told by customer service that , that was how my contract worked. All I want is to manage my data , so when it runs out I will buy some more . I was told that I can put me on a topup!!! I said great , I was never explained any thing about this package except that I would have to buy my data ,when the contract data ran out.!!!!!! Now I am paying for my handset R 250 pm which I did not pay for untill i changed packages and my contract expirey date has changed. Vodacom your customer care sucks and you just ***** peoples money......