Unresolved account

After my previous complaint about Vodacom, I received a call from Dean the next day who assured me that he is crediting my account and then cancelling the contract. The same afternoon I received 2 emails to advise me that my account has 'now been changed to prepaid'. Contrary to what Dean told me, but the emails are from a 'noreplay' address. I have stopped the debit order, but Vodacom have changed the amount and debited my account in excess of R2000.....needless to say, my issue has not been resolved in the least bit.!!!!!!!!!