Your game account version does not allow this upgrade.

How to help other players on Twitter.

Information on error BLZOWPAY10200279.

Information on error BLZOWPAY10200278.

Information on error BLZOWPAY10050216.

What to do if you do not have a Battle.net account but are receiving emails from Blizzard Entertainment

It is not possible to merge the progress of two or more games into one.

Friend or family member used payment information without permission and I would like a refund for the purchase(s) made

This article explains the process of speaking to a Game Master (GM).

This error is caused when you have the maximum number of game accounts associated with your Battle.net account.