Hi I had booked seats 1A and 1B in business for a flight in December. Now there has been and aircraft change and 1E and 1F are first class seats (the middle ones).

So the reservation still says 1E and 1F but also "Seats not available"

What shall we do? Wait until check in and risk getting to get not so good seats in business ? Or is there any chance it will stick? anyone experienced this before?