Vodacom not cancelling my contract

I have requested cancellation of two of my cell phone contracts by email to Vodacom last year, they rep**** back saying that they need my ID to be attached in order for them to do it. I then sent on 1 November 2015 an email to them for cancelling it with my ID included. This month I checked my account and saw that they are still charging for these numbers. As I am not using these numbers I need them cancelled and I want to be refunded back to November for these to accounts.