HOW CAN I NOT ASSIST YOU?

I have phoned FNB seven times, spoken to seven different people who give me different information, different telephone numbers each time. Some numbers just ring, others are engaged continuously and other people can't help. I have a query on a debit to my account at the Slow Lounge. How do you get to speak to anyone aside from the call centre who can't help. This is a business account and no one can assist and they just fob it off to someone else and different each time! I want a simple answer!