A FreeFlexer worked for you but it didn't turn out to be a great match. Or unexpectedly the FreeFlexer did not show up. You can block the FreeFlexer for future jobs. During the check-out of the no show you can check that you do not want this FreeFlexer to respond to your shifts in the future.
You can see your excluded FreeFlexer in your menu. If you would like to grant someone access to your shifts again, you can find out how here.