Q: I just got an email saying that my Apple ID was deactivated ,because someone tried to  use my account

Hi gamton,

Thanks for visiting Apple Support Communities.

If your Apple ID was disabled for security reasons, you may just need to reset the password to enable it again. See this article for more information:

Apple ID: 'This Apple ID has been disabled for security reasons' alert appears

http://support.apple.com/kb/ts2446

All the best,

Jeremy