I say this over and over, but saying no is the only power you have as an actor. At least if you lose the job, you can lose it on your own terms, and not theirs. And I’m not speaking in theory here, I’m speaking from experience. I’ve been asked twice to re-audition for projects over the years. I said no both times. One time they kept me. One time they didn’t. Life went on just fine both times.