Closing account

I went to the branch on Friday 3 July to close my account, but was told to call the call centre. Called the call centre and was told that all I need to do was to pay the settlement amount and call them after 24 hours to close the account, they will be open till 13:00 on Saturday. I immediately paid the amount. Got confirmation of the payment on 4 July, I phoned them to close the account, but he said that he couldn't close it because of the credit life on the card. I have to call the card department, but he will transfer me. Transferred me and all I hear is \The number does not exist". HOW do you transfer me to a number that doesn't exist??? I phoned them directly"