Someone else is logged into your account: How to I get to speak to a real person to get it unblocked!!

I had this issue a couple of days ago, but I don't know why or who? Has my account been hacked?

Also, I've tried everything to get it unblocked, but because I set up the account in the last century, I'm not even sure there were any security questions set up at the time and what my answers were. I can give all the answers about who I've sent mail to and had mail from, contacts etc but I need to speak to a real person!!!