Unfair credit ITC listing from Telkom due to *********** staff

My account was cancelled on 22 May 2020 but the Telkom call centre operater did not process it. Since then I've tried many avenues to get this resolve and finally on 2 October 2020, I get an email confirming the cancellation however Telkom has listed me on the credit bureau for non payment. Now I cannot apply for finance because of the ICT listing all arising from the incompetence of Telkom staff. How is this allowed? Why are my rights been affected while Telkom has no consequences? How many other peoples lives have they negatively affected? Can someone from Telkom urgently assist as my next avenue is to raise the complaint directly with transunion.