NO WAY to get joy cancelling a contract

Phoned Vodacom a few times to cancel an existing contract. 1st Call was to find out what must be done. 2nd Call to cancel the contract. Was told that it cannot be done via phone and only in writing. We got an email with the cancellation document and quote soon after the call. Completed and returned via email together with ID and proof of final payment. Copied and pasted the email and therefore no typos. No response. Followed up when it was not cancelled 9 days later and new month. Phoned again a few times and they refused to speak to me since my wife was not present to confirm ID as the contract holder. Sent email follow ups and no response. When my wife managed to call them she was told that they will cancel it end of month and that they have the cancellation request on record. She asked for confirmation message and was told to call next day to get it. My wife phoned a few more times and had to interrupt Matric exam marking to make phone calls. After many calls and consultants giving conflicting info she was told they do not have record of cancellation, can see the cancellation request, but not completed yet, will do today and send proof. Well, it is not done yet and therefore my post here. Now my public statement: VODACOM, IF THIS CONTRACT IS NOT CANCELLED THEN THE DEBIT ORDERS TO THIS ONE AND 3 OTHER VODACOM CONTRACTS WILL BE CANCELLED AND YOU CAN CALL US AS MANY TIMES AS WE CALLED YOU TO RESOLVE PAYMENT. Now Vodacom will copy and paste their normal replay that a consultant will contact us. Watch this space