I booked my flight last year,with USAir for a trip to USA in 6 weeks time.
USAir have now become AA since!
I hope I don't get crap service now as the flight numbers have changed to AA from AWE which was USAir.
I am flying from Manchester UK to St Louis via Philadelphia. Done this trip 10times now with only one instance of problems which was last year when the PHL to STL leg got cancelled due to weather issues, USAir were great! They put us on the early morning flight next day & in a hotel for the night at their expense.
I do hope they resolve your issue.
If I get any problems with my vacation flights it will be the last time I use this carrier!