Nightmare with cancelling telkom landline

Yet again it’s my ongoing battle with Telkom.

I have cancelled my landline on the telkom online site on 01/04/2019. Case number ********** 9. I have received a text message notification on 01/04/2019 on 07:10 to indicate that my query will be attended to.

On 08/04/2019 I have received a text message at 16:51 with case number ********** 9 to indicated that my case was resolved.

On 13/05/2019 at 11:51 I received my Invoice and the landline I have cancelled was billed and showing on my account.

I contacted telkom client care on 13/05/2019 at 13:45 and spoke to "Nomsa" with case number ********** 97A and they escalated it and assured me the line will be closed.

On 11/06/2019 i received my tax invoice and sadly to say my land line was again on the invoice and not cancelled.

My question to telkom. I have cancelled my subscription online as per procedure. i have received a text message indicating my case was resolved. How on earth is my landline not cancelled

This is unacceptable

Please help