Vodacom double billing for data

Vodacom billed me for out-of-bundle data while there were hundreds of Megs data available on the package according to the Vodapay app. Their customer care does not answer e-mails and on the phone I had to "hold on" for 15 minutes and more as a deterrent while they were trying "to find information" which should be at hand, which indicates the incompetence of the staff, including a "manager". Next stop - ICASA, if not the police