Same thing, I was in F on a 777 transcon LAX-MIA. I woke up this morning and noticed I was rebooked on an A321 at a horrible time (no email, I just happened to check). I called and navigated the IVR and finally got a message “The department you have called is experiencing high call volume. We appreciate your patience.” I thought the system was about to offer a callback but then said “please try your call again later.” And HUNG UP on me. 3 times today. I’ve spent the afternoon wishing that everyone who works at AA gets diarrhea for a month.