Information on Diablo III Account Rollbacks after your account is hacked.
How to update your BattleTag.
Information on error BLZ51900011
This article explains the process of speaking to a Game Master (GM).
Diablo III System Requirements
Recovering a Blizzard Account when the email address has been forgotten
Information about common payment issues and troubleshooting steps
Information on the Diablo III starter edition.
Information on restorations for Diablo III.
Player reports they had heroes they use to play in Diablo III and they're now missing.