FNB not responding to me wanting to settle and close my credit card

So I sent the CEO complaints people an email asking how to settle my credit card and close the credit card. I am overseas. I've been waiting five days for a response. I need to settle and close the account IMMEDIATELY but FNB seems unwilling to respond to my request. Please contact me urgently to do this. I'm not in SA so calling me will not work. Email will work. THIS IS URGENT. And if you tell me this can't be done without me physically present I will have a chat to the ombudsman. I am not accepting no for an answer. My credit card will be settled and paid off. Please note my cellphone number I entered below has a +1 in front of the number and please don't try to call me before 3pm because of the time difference.