Billing me for 6 months whilst line is broken

My telkom analogue line stopped working in June 2017 I logged several calls, but this was never resolved. Technicians indicated the fault was between my property and the Telkom distribution point. In September the DSL service on the line also failed after becoming progressively worse. Fault 51CWK281017. and I logged payment disputes for my invoices via the Telkom app and Customer Portals. The disputes "disappeared".

Due to the above, I have declined payment to Telkom and gave notice on the service.

Telkom sent me SMSs indicating my outstanding bill, and then sent me an SMS indicating my account had been suspended.

What ******* is this? Billing me for a service Telkom cannot deliver, due to no fault of mine.