Block List On Facebook
Click Facebook's "Account Menu" drop-down menu, which is the downward-facing arrowhead beside House, and pick "Privacy Settings"
Click the "Manage Blocking" link to open your Facebook blacklist. This Page lists whatever you've blocked on Facebook, including Users, applications and event, or application invites from particular individuals.
Each section lists the obstructed people or apps. Click "Unblock" alongside any type of entrance to get rid of the block for that individual or app. Facebook updates the setups instantly, so click "Facebook" or "Back to Privacy" when you're done to exit the Manage Blocking display.
From your Bussiness' Facebook Page Admin Panel, select the "Edit Page" drop-down list and also pick "See Banned Users" for a checklist of Users you've Banned from your Page.