Closing credit card account

Last week the 20th of August I requested a settlement amount for my premier credit card from FNB. I never got this I phoned the Tuesday or Wednesday and demanded they give me the settlement which they did. Whilst on the line I paid the settlement amount and instructed my credit card account to be closed with immediate effect. I was told it doesn't work like that and that they can only log a request. I phoned later that week wanting to know why it isn't closed yet and was told it can take up to 7 days. As I requested my original settlement amount on the 20th of August I really can't understand why this account is still open. I have all the call recordings if FNB wants it.