Few days ago my account was also changed, but no messages were sent. It looks like a random guy created an account and there was some error on Skype server. I just got an email that my password got changed, and if it wasn't me I should contact Skype support etc. And I did exactly what you did and got the same reply (but this time the name was Polish, but with just a first letter of a surname :P)
So I was wondering, if you have figured out anything. So far I'm in a dead end, as I try to report it, I only get replies from this weird email.
Greets,
Magda
