RingTunez ***** and Vodacom complicit

I have had a bill appear on my Vodacom account for a category called content services of 259.94, and having queried this Vodacom says that it is for 'something I subscribed to on the internet'!!

Further investigation they tell me it is for a service called RingTunez. Vodacom have no documentation from myself authorising this service nor from this 'company'. In terms of the consumer protection act, this is completely *******, at no point should a company be allowed to deduct charges without a valid contract or authorisation.

Furthermore, despite having 17Gb of available data in my contract bundle, Vodacom have additionally charged another R161 for data!! Again not knowing why this has occured.

Why does Vodacom think it is acceptable to de***** its customers?