Hotmail.com account

I have an email account that I can not get into due to my son using it with his XBOX. I need to get into this account, I have had it for many years and use it for business. When I try to sign in to *** Email address is removed for privacy *** I get a message that says this account does not exist. But when I tried to set up a new account using the same address it says that this account already exists. I did set up another account with hotmail, but I need my original back. New account that I set up is *** Email address is removed for privacy ***. Please help this disgruntled mother who wants to throw the XBOX in the trash. I know that my son hasn't been able to get on line with his xbox so something is going wrong on someones end.