Why hasn't my iCloud apple ID changed?

When I first set up my iTunes I was using a certain email address which was also set up for iCloud. About a year ago I changed email addresses and updated my iTunes ID to the new email, but I did the iPhone update yesterday and it asked me to put my password in for iCloud and I noticed the apple ID for iCloud still says my old address. It was asking me to put my password in and it wouldn't accept it. Anyone know how I can update it to the new address? I can't log into iCloud at all.

Hi
so you need to ask to have a password reset then as simple as that.

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