Poorest service on cell c

A worse service I am still experiencing since last year July 2021. I took a cell phone contract at mall of Africa branch June 2021 & payed the settlement amount July 2021. That very day I called them to ensure that they have received the funds and after their confirmation I requested that they update their records with all relevant credit bereau but until now it has not been done. Time and again I call to get an assistance and sent out emails to them to have this problem resolved but nothing has been done until now regardless of what they said it will be updated on credit bereau after 15 working days. This has a negetive impact on my affordability when I apply for a credit somewhere else. Poorest service ever