Condor has US numbers listed here:
https://www.condor.com/eu/popup_hotline.jsp
Super prompt and helpful responses the couple of times I have called. They can also do the seat assignments for Business.
You can also see your ticket on Lufthansa’s website (using Condor’s confirmation code), and enter mileage info, but I don’t know for sure that will get to Condor, so I would call.