Vodacom billing account after contract was cancelled

I'm lodging this complaint to Vodacom after the company billed my account after the contract I had with them was cancelled.

I received an SMS notifying me that my number was due for an upgrade. I logged onto https://myvodacom.secure.vodacom.co.za and saw the upgrade is due on 2 Aug' 17 and the contract end date 31 Oct '17. Since I did not want to upgrade, I visited the nearest Vodacom shop and completed a cancellation request form requesting the cancellation of my contract and to keep my number on prepaid since there was still airtime on the number. The form was submitted at the Vodacom shop on 31-07-2017.

24-08-2017 I contacted Vodacom customer services requesting a copy of my contract to confirm the date on which the contract started. The contract duration is 24 months and such would give me an indication if the date when the contract would end as per the website was correct. A "document request form" was e-mailed to me which I completed and returned with a copy of my ID to ********** but to date I have not received a copy of the contract.

On 02-11-2017 I received a SMS from my bank indicating that the debit order for Vodacom subtracted an amount from my bank account on 01-11-2017 and this amount was R 170.00 more than the debit order value for the previous 24 months!

The evening of 02-11-2017 I phoned Vodacom cancellations ********** to query the events, only to be told this service is closed at the moment, I need to phone again when they open tomorrow morning at 07:30.

I therefore request Vodacom to reimburse me for the value which was subtracted from my bank account on 01-11-2017.