Air time depleted by out of bundle data dispite new law

Cell C is not complying to the new law of out of bundle rates as my data was airtime was depleted as soon as my data ran out and when i called to get assistance from an agent she was told me its my fault i must set it up no to use my airtime? Cell C is a ***** and just has zero customer care their agents are trained to not give zero ****s.... Telkom and vodacom from my experience will never put u through such nonsense.... Cell C = daka masipa fella