My page has been hacked. What do I do?

[Keya]

Okay, so I dated this one guy and later on he ditched me. We haven't talked a lot and acknowledged each other in the admin group we were in. Eventually he turned into a piss-off for everyone, so I deleted him off the group but not off the page he and I were admining. Then yesterday, I got a notification saying that now, I am content creator and after checking, he's the only manager. When an admin friend of mine asked him why, he said he wanted to take revenge on me. (for what reason, I have no idea too)
So I need help and I know this sounds atrocious, but I'd appreciate it if you could help me out here. If it isn't a big problem I might need help in taking a little bit of revenge on him. But right now I need to focus my attention on solving the matter at hand. Thanks for reading and hopefully you reply!

[Puneet]

Info for the latest (GoDaddy, Network Solutions) round of infections;

http://blog.sucuri.net/2010/05/simple-cl...atest.html