How to report a bug in Diablo III
What to do if you can't complete this quest.
What to do if you are missing the achievement "Heroic: War is Hell" after winning a warfront and completing the quest.
Information on reporting incorrect rankings in Overwatch
Character didn't receive loot in World of Warcraft.
What to do if you can't find or start this quest.
Information about being unable to trade dungeon/raid/instance loot to another player
What to do if you didn't receive loot in World of Warcraft Classic
Information on unlooted items and The Postmaster.