FNB how can we make you pay for our mistakes

FNB has honestly the worst service when it comes to sorting out their mistakes. I paid my credit card and after it had been paid I got a msg saying it would go to legal if it was not paid in a month, I then phoned fnb and was told it had gone through it just takes 2-3 days to reflect on their side. After 2 days later my account had been handed over to legal after it had been paid (it was only behind due to the fact I had been seriously injured and fnb was informed and had received all medical documentation). After my first review fnb promised it will be sorted out and I would get feedback as to what's happening with my credit card, I am still waiting a month later. This is honestly disgusting service from a company that promotes "how can we help you" where as you don't help at all. I am now going to end up paying for a mistake that your staff made. Shot soo much for the "help". Fnb is a joke. I will never recommend FNB again