Still listed at credit bureau by telkom

Late last year, I was at Telkom Wonderboom Junction about my cancellation of landline which I cancelled in April online, and again in May 2018. Call logged & telkom contacted me. I asked them about my cancellation. Line was cancelled but billing dept didn't know, got account for R660. Queried this, and was told they would escalate. Then i got an acct for R280.05 inJan, which I paid. I asked Telkom to update my status at the credit bureaus. BUT this hasn't happened. Looked today and still see I am listed at credit bureau by Telkom. Please telkom, I need a letter to say I have paid up.