I used ReadySetTakeoff for my application review -- I echo the suggestions to use a company for review. This whole process is a lot of pay-to-play (opinion only). If you want to try to clean up your app and try again, the only email I can think of is the pilotcareers (flyfrontier dot com) one.

You also may want to scour the Delta forums under the "new hiring process" thread and other similar topics. There are a good number of posts about the airlineapps website and application errors/kickbacks that may be applicable.