Cancellation aren't cancelled

I cancelled my Telkom ADSL and Line in August 2017 before moving to a new city. Over a year later I'm still being invoiced (now R 9633) for service which I've cancelled 3 times physically in store, originally by email and twice confirm with call centre staff that they can see my cancellation on their system. I logged two separate disputes via their 'new' customer portal. Also had a lady from Durban (attorney) trying to threaten me to recover 'bad debt'. I explained I'd cancelled and she immediately apologised, knowing the huge ****up with cancellation that is Telkom.

No response.