Used miles for First Class - Ended up in coach on return trip


Sep 28, 2022
After long waits and multiple transfers I gave up trying to talk to the right department by phone and chat.
Used the link below to submit a request but have received no response. Am I out of luck?
We used 147,000 miles for two round trip First Class tickets from Albuquerque to Nashville. On our return the first flight was delayed causing us to miss our next flight. We ended up flying coach and arrived 7 hours later than planned. I provided copies of the coach tickets after being rerouted through Phoenix. Also provided the boarding passes for the flight we missed due to first flight arriving late.

We would like miles credited back since we used them to fly First Class but ended up in coach for part of the trip.