Question about Outlook Express

Dear Team,

Please I need your help in order to recover my Niece Account which was hacked by someone 2 days before. I tried each & everything but find no luck.

When I tried to click Can't access your account ? It require the Microsoft account details, When I entered the Email Address & filled the below information same like above box & click next then I Shows The Account is incorrect.

Please I require your help in order to retrieve the account.

Thanks