Poor service from FNB

Over two months ago, due to the high fees and charges,my wife moved most of her accounts from FNB to Capitec Bank. She got much better service and lower fees. Capitec Bank took over the accounts and paid off FNB. Now for the past two months, FNB continues to charge fees and other charges previously attached to the closed accounts. She has tried on numerous times to contact verious departments to solve these issues and get the money refunded, but no one is able to solve this issue. We are at our wits end, as we cannot afford to pay more money. We really need someone from FNB to solve this problem once and for all