Biling not updated

I went to apply for a loan at one of the financial institutions my application was decline because I owned Jet R534 which is not true. I paid up my account instead Jet owes me R5,30. I went to the store to enquire they said that it's paid up but on the bank system is shows something different. I than request for a letter that stated that the account was fully paid.<br> A lady by the name Rachel told me that I needed to wait for 48hrs which is ridiculous cause the account was paid on Tuesday and not updated. She Edcon and they too told me that there was nothing they could do I had to wait 48hrs. The urgency of my request has fallen to deaf ears. Please advice what should I do