Facebook hacked

Hello,
My name is chris ,I am very disappointed with my facebook account. It was hacked
I had 2 facebook accounts which i deleted.The first was deleted about 2wks ago & the 2nd account was about a half hour ago. The reason why I had to deleted it was because I was playing farmville .com. I got a virus from it . I was chatting to my friends on chat line. Farmville owner kept coming in on chat line everytime i said something to my friend. It was saying that it was going that they were going to delete my farm if I didn't stop using farmville .com .They said the samething to my friend ,when she ask me why I was saying all this to her,( which she taught was me but wasn't) thefarmville owner would come back & say it was. I log of facebook ,then phone my friend, while she was talking to me she notice that the samething was happenig while she was chat to another on chat line. This is twice that I had delete my facebook account . WHAT IS GOING ON WITH THIS FACEBOOK & FARMVILLE . PLEASE GIVE ME ANSWER...... Help meout :(