Sanlam Poor Service

I paid up my loan with Sanlam in March 2023. At first I struggled to get a paid -up letter with the correct details. To my dismay, 7 months later Experian has not been updated. I have sent numerous documents since April, lodged disputes of wrong credot report, numerously phoned both Sanlam and Experian (unanswered and where answered no help), emailed, etc; and still nothing.