Upgrading to unlimited?

[#1]

I changed my product from the 60g package to the unlimited package last week and it said it would change to it on my billing date which is today. It still hasn't changed to it and it would seem my 60g allowance has been refreshed for the month, i know it is only 1am but will it change over today or what?
Sorry i'm just confused on how it works if someone could explain it to me, many thanks.

[#2]

It can happen any time overnight, but probably no later than about 7am - it just depends when your billing is run.

[#3]

The account change scripts generally run between 2am and 7am, due to the amount of different processes that run we can't do everything at Midnight. Looks like you're all changed now though and can enjoy the freedom that Unlimited offers.