Telkom charges for a cancelled account

Due to our relocation overseas, we submitted a cancellation request for all our Telkom services including our ADSL effective 30.09.2017. Telkom confirmed on 05.10.2017 that all services had been cancelled 30.09.2017 - this was confirmed with Nokukhanya Mbesa and I have saved this chat discussion. We have now received a bill for charges for November on these cancelled services.

The feedback from Telkom is that we must phone as this cannot be resolved via mail or chat. This is not practical from overseas. Calling from overseas is pricey and even pricier when placed on hold for 30mins,

Telkom, please fix your mistake and credit all charges charged after 30.09.2017 including all interest.