Assumung you don't have status yet with DL and can't call SMS, I would go back to MKE and ask to speak to the station manager (not a supervisor, the station manager or highest you can get that's there). Wait until he/she turns up. Explain and show. If he/she doesn't acquiesce, ask them to at least let you go to ATL and take it up with the agents there.
While you're waiting, document everything and email DL via this
link.
Good luck, and PLEASE come back and tell us how it worked out.