Not updating the credit bureau

I borrowed money from FinChoice in the beginning of January 2018 as I needed the money urgently, just before the month end on the 21st of January 2018 I settled the whole amount that I was owing as I wanted my credit record to be updated quickly as I want to buy something big on credit. Now when I go to the service provider they tell me I should wait for FinChoice to remove my name from the credit bureau even the paid up letter can't help. When I call FinChoice they push the blame to the Credit bureau for not removing the credit and when I called Transunion they told me it's FinChoice that hasn't brought the paid up letter to the. What surprises me the most is that I paid up my Capitec credit card and within 4 working days it was appearing as paid up and closed on my credit record. I'm failing to understand why is FinChoice taking so long to clear up whereas Capitec could be cleared in 4 days?