Credit Card account

I have received a settlement quote, paid the amount and received a settlement letter but the account is still open. Withe the below email sent to me this morning:

Good day,

We confirm that FNB has withdrawn your account from us and that we will accordingly no longer attend to this matter.

Should you require further assistance please do not hesitate to contact FNB Customer Care on ***.

We do apologise for the inconvenience. Thank you,

Kind Regards,