What can you ask from blizzard… 
Same issue here. Stuck in another game.
all my char ar in another game for 19 hour fron now ActivisionShit fix it
My Battletag: HeavyMental#2632
Greets from Denmark.
-Im also 1 of the unlucky ones, getting locked out. Several hours have past now, and i went from 1: Failed to enter game. This character could not be found on the server ? (wtf)… and now its 2: Failed to enter game, this character is already in a game…
so neither single player or online play… quite frustrating when having a cold. Sneeze 