NO ACKNOWLEDGEMENT OF CANCELLATION

I called the call center on the 3rd of November requesting a cancellation on one of my contracts which expires end November. The call center agent Sanelisiwe advised I need to fill in the forms and submit it to [Email Removed] which is apparently the cancellations department. Today I received an invoice charging me for December, the confusing part is that there was no charge for November but suddenly the amount was re-instated for December and increased. no-one acknowledged receipt, the agent just said it will go through to the cancellations department and cancellation would be effective as of end November. After contacting the call center and explaining to them the situation, I was informed that Sanelisiwe does not work in the cancellations department so she could not follow this up, I was also informed that there is no contact number for the cancellations department, only an e-mail address [Email Removed] which i had to resubmit. Does telkom now expect me to pay for the contract which has expired and not followed up on their side, this is unacceptable that I am being charged for other peoples incompetency. Can someone please follow this up.