To fix your Facebook connection problem could you please try:
(1) Log into Facebook on your desktop machine.
(2) On the left hand side in your "apps" section find Collapse Blast.
(3) To the left of the Collapse Blast icon there will be a pencil.
(4) Click this and then remove app.
(5) Go back and install from Facebook again by going to the Collapse Blast page here: https://www.facebook.com/appcenter/collapse-blast
(6) Then “Play Now” on the right side.
(7) Load the Collapse Blast app on your phone and attempt to log in via Facebook again.
Rest assured by removing and then re-adding the app you will not lose scores or lives.