What's Telkom relevant accounts department?

I have paid Eskom in full for outstanding balance of R2697.45 on my land line account in January 2019. I'm now unfairly listed on credit bureau for landline account with Telkom which has already been terminated, since 8 January 2019 have requested settlement letter several times and I'm getting no response. I have been on their several outlets situated in shopping malls and was made to hang on phone to no avail. Can anyone please help me to sort this out. Have since sent email to ***