locked out of account “someone may be accessing your account”

I have had my email account for over 10 years. Never a problem, I active duty military and move every few years. I gave my son a NABI for Christmas.  Signed him up on Skype using my email address and signed myself on an ipad Skype account using the same email address and information.   I tried to get on my email account and had the message someone else may be on your account.   I filled out several request over the next couple of days and even made 2 phone calls all with the same answer; you need more information to verify it is me.   The information on the account is not mine for contact.  I finally called Skype to cancel those 2 accounts which was done; but still locked out.   It took forever to get this account to open just so I could write this email requesting you please assist me----this account is used since I have to rapidly deploy in emergencies.  Can anyone assist me?