Charged after notifying vodacom termination of contract

1. I called two months prior to give notice that I am going to cancel my contract at the end the term for my contract which was 24 September 2017. Which they didn't cancel. 2. I call just after 24 September 2017 to request a settlement letter for my contract only to find it was still not cancelled. 3. I call on 6 October 2017 to request a settlement letter again, I was told I will receive it 7 to 14 days, which I didn't receive it. 4. I call on the 18 October still no help passed to many departments still no settlement letter. 5. I was debited 27 September 2017 although I gave notice two months prior 24 September 2017