The Blizzard End User License Agreement explains what you may and may not do with a Blizzard account. This article highlights a few passages from the EULA that are most relevant to this policy.
This article explains the process of speaking to a customer support representative or Game Master (GM).
How to obtain error logs for Blizzard games
What to do if you have lost access to your Blizzard Data File.
Troubleshooting for issues loading the BattleTag or Real ID friend list
Information on how to contact Blizzard Entertainment for any accessibility concerns with our games, support or products.
How to submit feedback about our website or request features
What to do if Battle.net Mobile Application does not load properly
What to do if you receive this error on the mobile Battle.net app