overcharging

I upgraded my data contract on 11-06-15 was charged a prorata for June which was debited contract is 99 for 2gb peak and 3gb for nightsurfer I asked the consulant to put a cap and he let me speak to a consultant @ cell c and she put a cap of 50 rands nt advising properly that its a data for call and sms.y would I put a cap on that if it was a data contract? If I was advised correctly I would have nt taken this contract!! I mean to pay 500 rand for a 99 contract is ******* where as adsl is far cheaper and neotel has 10gb for 118rands. Cell c are ripping people off. Leaving Vodacom which I Neva had a problem. With thinking cellc were better what q huge disappointment.