Cancellation of Contract

<p>I cancelled my contract (after the 24 months) in July 2016. This was confirmed by Vodacom in writing however, Aug '16, Sept '16, Oct '16, Nov '16, Dec '16 my bank account was debitted with exactly the same amount every month. I communicated via the Customer Care centre a number of times and they once again confirmed that it had been cancelled, they had raised a query and would get back to me within 72 working days. 2 weeks later, I still have not heard from them yet I received an invoice confirming that the same amount would once again be deducted from my account at the end of Jan '17. What now??</p>