Poor service delivery from Vodacom

We have changed our debit date with Vodacom , the customer service agents did not change it correctly , I have emailed the CEO department and have call over 20 times to fix this issue they debited us twice in one month and it's gone one and a half months and they still have not yet sorted our query or credited our account . The debit date is incorrect ! When I call I have to explain everything again trying to get to someone who can help is like a battlefield. They have no customer service. Rude and arrogant! Never again will I be upgrading my contracts with the Vodacom network!