No, there are NO way to change your last name on the account. I have tried everything, but they answer always this:
Hello,
Thank you for your email. We only change the name of the account owner following a legal name change. Unfortunately this does not apply to your case and so we regret to say that we cannot help you in this matter.
Should you have any other billing questions do not hesitate to contact us again.
Kind Regards,
Blizzard Entertainment Europe
Sandra A.
English Billing Support
http://eu.blizzard.com/support
Phone Numbers:
http://eu.blizzard.com/support/artic...rticleId=23210
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