According to
http://www.lawa.org/welcome_LAX.aspx?id=246, airlines at T2 are Aeromexico
Air Canada
Air China
ArkeFly (Seasonal)
Avianca
Hawaiian Air
Sun Country
TACA
Virgin Atlantic
Volaris
WestJet
I can't imagine what local Aeromexico staff not appearing sorry there was no lounge has anything to do with the issue. The people one interacts with at the airport have no say in whether there's a lounge there or not. Based on passenger load, etc. We flew American Airlines fc, connecting to an international biz class flight, out of SEA, and there was no AA lounge there. The partner lounge (Alaska Airlines) allowed only AA passengers who were Admiral Club members. Such things happen.