Vodacom providing my bank details to a 3rd party - unauthorised

<p>Vodacom, I'm appalled. I got a phone call from someone claiming to be 'in partnership with Vodacom' Comet or Infinity or something. Offering me a free data bundle for been such a good customer of vodacom's. I never authorised a debit order or ever provided this 'vodacom partner' with my banking details. This was afterall a FREE offering supposedly. Next thing I know, i'm been debited by some unknown party for a service I know nothing about. How on earth did they get my bank details ???? Clearly Vodacom thinks nothing of handing out our bank details to 3rd parties and these 3rd parties just go ahead and put through *****lent and unauthorised debit orders.</p>