How to redeem a Blizzard/Battlenet Code
Website
1. Log into your Account Overview
2. Enter the code in the Redeem a Code box and click Redeem Code.
Battlenet.net App
1. From the Games tab, click the Redeem a Code button found under the logo of any game
2. From the Shop tab, click Services and then Redeem a Code
Battlenet.net Mobile App:
1. Login to the Battle.net Mobile App.
2. Click Profile.
3. Expand the Account section.
4. Choose Redeem Code.
Any further additional assistance can be acquired by contacting Blizzard support at the following link :