How do I unlock my iCloud account?

First, don't post your Apple ID on a public website. That is a quick way to get it locked if another person attempts to log into your account with an incorrect password. If you password is entered incorrectly too many times, your Apple ID will be locked. To assist with the issue you are currently having, review this Support Article:

If your Apple ID is locked or disabled - Apple Support

If your Apple ID is locked or disabled

If you or someone else enters your password or other account information incorrectly too many times, learn how to regain access to your account. 

If your account has been disabled for security reasons

If you see one of the following messages, your Apple ID automatically locked to protect your security and you can't sign in to any Apple services:

• “This Apple ID has been disabled for security reasons”
• "You can't sign in because your account was disabled for security reasons"
• "This Apple ID has been locked for security reasons"

You need to reset your password to regain access. Learn how to reset your password. 

If your account has been disabled in the App Store and iTunes Store

If you see a message that says your account has been disabled in the App Store and iTunes Store, contact Apple Support for help.