Account Cancelled 7 Months ago, Still getting invoices

I cancelled my Account in June 2017, I was told i have to give 30 days notice, which i agreed to as its the norm, 30 days later i received a message saying "sorry to see you leave, account has been cancelled".

Since then i have been fighting and calling every week as my account is still active and im still getting invoices. Now the debt collectors or lawyers as they call them self are calling me.

If you call Telkom then they will forward your query it to accounts and cancellation department, but no one gets back to you, if you email them you get no reply.

If you complain on Hello Peter you get this:

"Hello Scooby8005,

Your request is currently under investigation with our accounts department. Once resolved feedback will be provided

We do apologize for any inconvenience we have cause to you.

Regards"

which will probably be the response to this complaint, and still no one gets back to you.

How do you fix this?????? Absolutly Pathetic