I also sent a message through ELIS 2 days before I got approved. I stated that I felt my file was corrupted and was getting no attention so if I could have it processed outside of ELIS like last time. I received the same response about forwarding it to Nebraska Center and was then approved the next day.
I did so much to try to bring attention to my case that I really don't know which one brought results.
Congressmen (I know that didn't), Multiple SR's, NILC flagged twice, went to InfoPass appointments and made them call Nebraska center directly both times, Ombudsmen request, and Email for help (both types)