Vodacom never fails to **** off their customers!!

This evening 6 April 2015, I got a call from a guy saying that he receive sms' s regarding info on a data contract that is on my name, so he went to Vodacom and ask them about this and they said the contract belong to me. He even forwarded the sms to me as proof. 18h27 I called Vodacom customer care and spoke to Tato and after 30 min on the line she said to me it was my fault and I need to correct this on my account by setting the notification to the right number. So I check the settings and notifications is not even activated on this number and how is it possible that this guy who's number I don't even know gets my sms' s and my details??? I need Vodacom to rectify this ASAP and I need an explanation on how my personal information get send to other customers. Vodacom ' s customer service is *********** and I would like to cancel all my contracts with Vodacom at Vodacom ' s cost. This is unacceptable.