Why am I always blocked out of all my hotmail accounts?

Since the change over to Outlook I have had problems with all my hotmail accounts. Almost every time I log in it says the password is incorrect (it isn't) or that sign-in is blocked. I have managed to get mine working as when it says its blocked I just restart the page and try again and it works. However my flatmate is blocked out of both of hers, we emailled the form to re-open it and both times it said not enough information was provided (surely she's not the only one who can't remember recent email subjects without looking???). Any help on unblocking hotmail accounts that were blocked for no reason in the first place?