FNB and its staff - useless bunch

I've been patient and have now exhausted all avenues; its clear that FNB is taking me for an ass so here I am on hellopeter because calling companies out is clearly the only way to see things to finality these days. I paid approximately R9300 in June in settlement of a credit card I held with FNB. I did not receive a paid up letter as requested at the time. FNB remains on my credit profile where it is negatively affecting my creditworthiness. As such, I lodged a dispute with compuscan who requested a paid up letter from FNB. The need to obtain the paid up letter has now become urgent. I called FNB Premier on 28 November at 10h19 and 2 December at 15h13; 16h51 and 16h55 to request the paid up letter. The first time I called I was promised the paid up letter within 4-12h which obviously did not happen. The second time I called I was promised the paid up letter by 17:00 on the same day. This has obviously not happened. FNB, what is the difficulty about what I'm asking here? This was not a small amount I parted ways with yet you cannot even furnish me with a letter confirming that I have settled my credit card. I do not even bank with FNB anymore, please explain to me why this is so hard? may I please get my paid up letter to *** as a matter of urgency. Thanks