All my yahoo accounts hacked?

[Matthew]

I love yahoo, its easy to use and very helpful.. but recently i have well over 10 yahoo accounts that i dont use anymore, (1-3 years) and i got this Yahoo Alert email saying each one was logged into.. It was fishy but i changed my password on most of them and it said that each one was logged into from Ukraine - On Yahoo! Partner's Application. So i have Facebook on one of my yahoo's and i am a little concerned if they got all my details and using my identity online.
I would like to Contact Yahoo via mail, not this but it will do.

Anyone with information about this? Because I got them all a day apart, its weird cause i haven't logged onto some of the accounts in like 3 years.
I HAVE NOT DOWNLOADED ANYTHING/BEEN PHISHED. Please don't make a comment saying you were phished or keylogged, thank you.
@Elizabeth Did you even read my question???? Did i say i wanted to close it? Jeesh this is why i hate yahoo -_-