LOAN PAID BUT NOT UPDATED WITH CREDIT BUREAU

I am very unsatisfied with FNB regarding their admin. I had temporary loan with them in July and paid the loan in full in July 2018 already however, on my credit bureau profile it still shows as the account owing 6 months later! I have tried to contact FNB but you hold for several minutes on end! This has had a negative impact on my credit scoring. For a bank that I once trusted, FNB has let me down.