Express your disappointment. The word "disappointing" can be very effective among certain personality types. You did your due diligence—the offer seemed high (

Express your disappointment. The word "disappointing" can be very effective among certain personality types. You did your due diligence—the offer seemed high (but not unbelievable) and you checked and double-checked it for accuracy. At some point a reputable (as you describe them) company is going to need to own their mistake. Even if you never believe that they had bad intentions, trust is at stake. Trust that management has all of their ducks in a row, communication is working, etc. If you're in a position where the money isn't a huge deal, but are willing to negotiate for other perks (extended vacation time, additional holidays, WFH benefits, health spending account, more frequent performance/compensation reviews, etc), then do that—but I wouldn't say that you're under any obligation to make those concessions.