I would also talk to the German embassy and especially their consulate:
Since your case is a time limited hardship matter, also contact your local news reporters/TV stations. It is amazing how bureaucrats will change their tune if contacted by the news media.
Great point. Use some leverage.
Great ideas. Thank you!
Having been in a somewhat comparable situation, I see this as the best advice. A Congressman can make this work when no government drone sees any urgency.