Troubleshooting PayPal payment issues
Troubleshooting steps for what to do if you get this error when trying to make a purchase.
Buying Battle.net Balance as a gift
What to do if a mistake was made with a purchased gift
Information on how to update your billing profiles.
What to do if you can't claim a Battle.net Balance code because the currency of the code doesn't match your currency
Battle.net Balance cannot be used to pay for some Blizzard products