hi!

booked on a flight to pek in F however flight now changed to a two class aircraft, I'm now in C however paid the F fare obviously. EK gave me the option to full refund or change foc to a date where F is available (not an option as the schedule is already really tight).
if I recall correctly there is something like '75% of the fare difference' to get something back?! EK told me that this only would apply if the change of aircraft is T-48h.

any ideas?