Unauthorised debit order

<p>In March 2016 I cancelled my debit order because Vodacom don't know when the 1st day of the month is and then deduct on other days when there is no funds available. Since then I've been paying via eft or cash every month.</p> <p>This morning I woke up to find that without my authority or knowledge they tried to debit my account on the 3rd of October with the amount of R969, once again not on the 1st!?!?!?! Causing my account to reflect a debit order return and bank charges of R100. Is this even legal? Can they proof who authorised this and what is the legal implications for debiting an account without priot knowledge or authority of the account holder?</p> <p>Can we involve the Ombudsman?</p>