Billed for an inactive Adsl line for over 2 years

I am a client that is taken for advantage of by Telkom for over 2 years. The Adsl data and voice line never worked effectively due to cable *****. Telkom decided to recommend an alternative service, which I subscribed which is an LTE. I have been using it from early 2018 but the Adsl and voice line is still not cancelled. A service exchange was not done or replacement. I am paying the LTE 899.00 a month and Telkom is billing Adsl every month, a service that was terminated by Telkom due to cable *****, I am billed for a service that I do not have. I have been handed over by Telkom several times for this Adsl account that is non-activate and terminated 2 years back for debt collection. I have visited the Telkom shops and called the call Centre but no resolution. This Adsl account is appearing on my Credit Profile negatively. Can Telkom please close this inactive account for the Adsl and voice line. I have received an invoice over 6000.00 rands, I called Telkom last month to resolve this query but it’s still not. The call Centre is totally unable to assist, they keep asking me the same questions, give reference numbers and nothing happens. Today I received SMS’s of a lot of reference numbers and stating queries are resolved....... what a bad service. May Telkom discontinue billing me for an Adsl service that I am not receiving and credit that invoice.