How to unblock someone on facebook - it's easier than you
Facebook - Log In or Sign Up Create an account or log into Facebook. Connect with friends, family and other people you know. Share photos and videos, send messages and get updates. Help Center - Facebook When you unblock someone, that person will be able to see your posts on Facebook that you share with the public. The person won't automatically become your friend on Facebook. If you want to become friends with a person who you've unblocked, you'll need to send them a friend request. How to Unblock Someone on Facebook - MakeUseOf
Aug 22, 2012 · The only scenarios I can think of would be that the person created another FB account, and you now need to block that one. (You can check in your account settings who is blocked to see if they have actually been unblocked, or just created a new account.)
Facebook blocked my website. Here's how I got it back
Unblock your favourite sites such as The Pirate Bay, Kickass torrents, Primewire, etc
Messenger 2321,47,9,18 - Facebook Instantly reach the people in your life—for free. Messenger is just like texting, but you don't have to pay for every message (it works with your data plan). Facebook bug unblocked 'blocked' - Mashable