Struggle to pay up revolving loan

I am struggling for 3 months now to pay up my revolving loan and to close my account. I first tried to call several times and get transferred to everyone, but no one can help. I the went to Branch in North Rand Road Boksburg, where they put me in front of the phone with the same results. I then went to the East Rand Mall branch where the consultant tried to phone with also no results. He then said he mailed the department and will call me. 3 Months later still no contact from FNB. I then tried to call this week again Monday 16th November 2020, no luck also as the consultant transfer me back to the main menu. And after that I am holding on for "days" I then send a mail to report the problem. I got an automatic reply saying that my issue will be dealt with, within 3 working days. Today 19 November 2020 is 4 days and still no respond. So, I phone today again. Again being send from 1 department to the other, till a point where an automatic response of I must have the app to continue.. Long story short, I just want to pay up my loan, get the correct account number to pay it in as I was on debt review and don't just want to pay into any account not knowing where the money is going.