Put block of wood against rotor. Can try top, front or rear. Hit block of wood with small sledge. Metal is shocked, rotor is free.
Re calliper, turn steering full lock so that the front of the rotor is pointing inward. Use breaker bar with socket*. Or slide your jack bar over the socket wrench is no breaker bar available. Calliper is free.
*falcons sh*t turning circle actually MAY not allow for a very long breaker due to wheel arch getting in the way.