Telkom Fibre Line

I have requested via calls and emails for my fibre line to be disconnected from December 2021. Each time I call or email I receive confirmation that the line has been cancelled/disconnected. To date I still receive invoices for the line that has not been working or active from date off commence. My account get debited without authorization. The service received is really unacceptable and alone seems to know who is responsible for fixing this