FNB ***** - TAKING ADVANTAGE OF ME

FNB moved my account from Premier to Private clients without my permission. I complained and requested to be moved back to my Premier credit card account. While they were still "sorting" out my problem, I incurred charged which they moved back to my Premier credit card after they "resolved" my problems. When I complained about that, their spin doctor called me to explain and defend themselves - he also claimed to have reversed the charges and sent me a recon statement, however, the bank still maintained that I owed that large accumulated sum of money. Im really tired of taking my time and complaining, which is what they want. Why does FNB do this to us, how many people a month do they do this to?