Terrible service from FNB

Monday, 29th July, I requested a settlement letter for my FNB credit card. I was assured i would receive it in 2 days max. Today it is the 1st August and still no letter. I tried calling and was treated like an idiot. Asked to be put through to her manager and was told for that to happen, she would have to log a call and the manager would call me back within 24-48 hours. Nedbank, Discovery and Standard Bank all furnished me with said letter on the same day !!!!