Account Closure.

Good day.I have been trying to get an account closure and paid up letter from them for almost a week now and no luck.I was given a settle amount and paid it now I can't seem to get my account closed.I spent almost almost up to 4 hours on the phone just trying to have this resolved and still no luck.They give you five days to pay(which incl Sat and Sun), but doesn't apply to them.Just absolutely pathetic.