I specially registered an account of the website to answer this question. I have the same experiences last two days, its just too horrible. My facebook account is still ok to log in, but my page admin role has been removed. Hacker posted dirty photos on the page, which hurts me a lot. Our page has over 400K fans. It really means a lot to our business. We invest a lot money and time on it.
I searched on internet a lot for this, this post really helps me a lot, http://forums.cnet.com/7723-6122_102-571105/my-facebook-fan-page-got-hacked-into-how-do-i-recover-it/
We sent email to all the address that we can, such as help center, advertiser email etc, even sent msg to CEO, CFO, COO of FB, of course they don't reply us. We called fb customer services, but only voice mail. We searched on internet for all the real person on facebook that we could find and send email to them. One of them replied and 1.5 days later, the page is returned to my account. Thanks god. The key point is to find the real person in FB.
I did not contact the hacker through the whole procedures. I always think we can get it back in normal way.
Now we secured our account with phone log in function.
Wish all pages hacked be returned to their owner.