500 MB of data gone, NO internet and NO help

After recharging with 500 MB of data and having it disappear, Vodacom disabled a service I did not authorise (which gobbled up all data in a matter of minutes). My internet has been down on my iPhone for 5 days and the call centre keeps dropping my calls after 30 minutes on the phone with them each time. Not impressed with the inefficiency and inability to restore my internet connection after they changed settings. The 'Self-Service' option offers no help whatsoever either.