My 3 E-mails accounts have been locked

I don't really know where to begin with this issue, I am really stuck, over the last few years I have made a total of 3 E-mail addresses, two nights ago, I tried to log into one of them, to which it stated "We think someone else may be using your account" So I chose the E-mail me a reset code.
However, my second account said the same message, and also unbelievably my third account, therefore I could not opt for an e-mail reset code which in my eyes was a bulletproof form of account security, I tried ringing Microsoft directly, but found out that an Outlook phone support line did not exist. Therefore I proceeded to make a new 4th account and began to fill out the questionnaires however it seemed to bank heavily on the E-mail's sent side of things, and I never really used it to send E-mails, just simply to have the occasional Facebook update, or perhaps some gaming news from one of my many game subscriptions. Needless to say, I was informed my information presented was not sufficient on all 3 accounts, which really put a downer on the day, lastly, one of the accounts had the phone option attached, however due to the fact it is many years old, I have since got a new number and deleted the previous number from existence.

Any help to get any of the accounts back would be greatly received

Many thanks,
                            Adam Williams