ADSL LINE DISCONNECTION

I had a telkom ADSL line for the past 15 years. I never had a problem with this. Recently I was away from home and upn my return on 6 May 2024 my internet was off. My landline did not work neither the internet. When I phoned Telkom, I was told that the ADSL is discontinued and I must get an alternative. On 6 June I received my bill and Telkom charges me R650.01 for a service that was never rendered to me. Telkom never informed me when the ADSL line will be cut or discontinued. I refuse to pay this bill or until such time somebody gets in contact with me because the people on the telephone line cannot help.