Incorrect listed with the Credit Bureau

I settled my car with Standard bank in December 2016 and received a settlement letter from standard bank asset management. However the information on the ITC /credit bureau still reflect that I owe standard bank R112 146,00 with the monthly installment of R8061,00. I contacted Standard Bank numerous time asking them to send the update to credit bureau that the account if fully paid, however up to day they have not done so. Every time I call standard bank they tell me that the issue will be resolve in 48 hours, I have calling them since the 10 January 2017 and still today the issue is not resolve. As a result of this I have lost out on the opportunity to buy the house because the banks say my credit rating and affordability is low. I am so disappointed with standard bank such that I will never recommend them to anyone or apply for finance with them.