Still being billed for account cancelled in Nov 14

i went in to the Telkom branch in Hillcrest on 21 November 2015 to cancel my husband's business line. He had given me a letter of cancellation and a letter of proxy - along with CK docs and a copy of both of our IDs. The consultant at the HIllcrest branch said that he would fax the relevant documents to the correct department. This fax was sent to *** on 21 November 2015 at 9am and consisted of 8 pages (I retained the proof of transmission). My husband confirmed a few days later that this line was no longer connected so I assumed the cancellation had been actioned. We then received another bill with monthly charges - so i contacted the call center and was advised that the consultant had faxed the documents to the \old"cancellations number!!! I was advised that I should email the same documents (along with the proof of the error by the Telkom consultant) to [Email Removed] - which I did on the 15 January 2015. I received a generic email in reply requesting certain documents - all of which had been attached to my email! I rep**** that I had supp**** to documents and forwarded the original attachment. Ever since that the STOCTs mailbox is \""full\"" and uncontactable"""