Several month ago I singed up for a free trial, but didn't upgrade it to a paid service. Recently Apple has transferred my account to iCloud, so I'd like to use it again. I log in to iCloud easily, but can't get access to my mail. How to get it work? P.S. I've just created a new Apple ID with a free iCloud email address, and it works fine. But I really want to use my previous username.