DEBIT ORDER DISAPPOINTMENT

I HAVE BEEN A FNB CUSTOMER FOR A LONG TIME. BUT RECENTLY I AM MORE THAN UNHAPPY BY THEIR SERVICE. I HAVE AN ACCOUNT THAT HAS BEEN BOMBARDED BY DEBIT ORDERS THAT I HAVE NOT AUTHORIZED NOR DO I KNOW WHO THOSE PEOPLE ARE, I HAVE REVERSED THEM ALMOST A YEAR AGO AND HAVE NOT GOTTEN MY MONEY BACK. URGENTLY CONSIDERING CHANGING BANKS