Unfair Customer treatment

I settled my credit card account with Standard bank through MBD in 2020. It still appears and affects my credit score as it shows as though I have a credit card. I have me calling numerous times asking for my paid up letter and I still do not have. On Friday I emailed the Manager Percy M but I have received feedback yet. This treatment is unfair and unprofessional. No client deserves to spend so much time and money on constant follow up and calls with no positive feedback just a constant 7 working days waiting period yielding to no results