Extremely frustrated...

Extremely frustrated with the service from Cell c had settled my account with them last year July 2021 got the paid up letter to prove it but still listed on my credit profile how's that possible it's almost a year gone and it's been stopping me from getting vehicle finance what ******* service is this, been dealing with someone by the name of Puseletso Phakoe via email he still hasn't been able to assist with the issue what's going on guys?