Honestly…
…if you’re one of those people who doesn’t answer phone calls, doesn’t respond to email quickly, and just doesn’t respond to any correspondence in a reasonable amount of time, you should not be working in the film industry… let alone the AD department.
Don’t throw a hissy fit because your name’s not on the call sheet anymore after not getting back to the producers for over a week.
Deal with it and answer your fucking phone next time.
