Vodacom unable to effectively cancel a contract

Cancellation & billing departments unable to communicate. After struggling for weeks to cancel contract by email finally cancelled the contract in Nov last year by phone from a Vodashop. Never received cancellation confirmation which they assured me I would. Luckily cancelled debit order but now they indicate that I'm in arrears. Now cancellelation department can't 'cancel' because of 'arrears'. This is a ridiculous situation crated by these giant companies where you can never get a knowledgeable person to speak to. Pretty sure new consumer legislation makes it ******* for them to make customers lives miserable when trying to cancel a contract. Such poor service, will never take ou a Vodacom contract again. Have to commend the Atterbury Vodashop staff. The only ones really that really tried to help