1. See my User Tip for some help: Some Solutions for Resetting Forgotten Security Questions: Apple Support Communities.
2. Here are two different but direct methods:
a. Send Apple an email request at: Apple - Support - iTunes Store - Contact Us.
b. Call Apple Support in your country: Customer Service: Contacting Apple for support
3. For other queries about Apple ID see Frequently asked questions about Apple ID.
5. For online assistance use Apple - Support - Express Lane
Click here for information. If you've forgotten the answers to the security questions and can't get them emailed to you for some reason, contact the iTunes Store staff via the link in that article.