NO SERVICE - TAKING MONEY FOR NOTHING - DATA SERVICES (*********)

I have had for the past 3 months been billed for "data services" which was over R900.00 per month. I have phoned vodacom and they instructed me to send an SMS to 31050 with STOP ALL. I have send this SMS about 10 times and every time it sends me back an SMS saying I am not subscribed to any services. Then i was instructed to go to live.vodafone.com and go to my account and then my subscriptions however there was nothing. I have taken screen shots of all the requests and answers that shows there is no service. YET they bill me R900.00 and cannot even tell me what it is for! This is like *****ing really???? Such a big company and they cannot protect your cellphone number and just bill and pay for services not rendered? I have again called the call center *** and now awaiting feedback again. This is just ********* how many other people is being ******* like this. I will most certainly cancel my contract!