It would help to know what numbers you have (maybe even who provided them) so people would know whether they are giving you duplicates, such as this: http://www.lawa.org/welcome_lax.aspx?id=1590 Note that page also gives a LAX police number for filing a police report for insurance purposes (and they may have another TSA number if the one listed is only an answering machine even during business hours).

I assume you called during the hours listed. If all else fails, I'd phone the airline-- the number for their office at LAX, not the main nationwide number.