Can’t find Contacts Anymore

Running Windows 7, Windows Live Mail, using a primary email address with bellsouth.net.  I was getting messages that too many attempts were made to sign into my Live.com email address so it was frozen.  After I got it unfrozen again, my contacts and categories of contacts are gone-vanished. There were over 200 email addresses from church members to business associates.  Some of the contacts are still out on bellsouth.net account, but not all and there are no categories.  Is there a way to recover my categories and contacts?  I don't believe I've deleted them from my computer, but don't know how to find them within Windows Live Mail.  Please help!