account locked

If you've received an email it won't be from Apple, it will be a phishing email (Apple doesn't send emails about accounts being locked, and obviously they wouldn't need to ask you for your SSN ; Apple/iTunes also knows your name so wouldn't address as email as 'dear customer', 'hello' etc.) - you could forward it to Apple : reportphishing@apple.com , and then delete it.

Phishing and similar emails : Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support

Genuine iTunes emails : Identifying legitimate emails from the iTunes Store - Apple Support

This is primarily a user-to-user support forum; other Apple users like yourself. The following may help: If your Apple ID is locked or disabled - Apple Support