DELTA: Have a Comment or Complaint?

The Delta Messenger eamil notifying me of the delay of my flight leg from BTR to ATL ...
Monday, May 7, Flight Delta 5371, Operated by ExpressJet Airlines
Departs 4:25 pm Baton Rouge, Louisiana
    (was) 4:00 pm
Arrives 7:05 pm Atlanta, Georgia
  (was) 6:34 pm
was sent "5/7/2012 7:48:19 P.M. Central Daylight Time"

Getting a notice more than three (3) hours after the new departure time is really not helpful.

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