Maybe it's just me, but if I find insects in your product the last thing I want is more food from you.
Judging by the happy response I get when I do it, it's just you....lol. And yeah, preferably replace with a different lot #? Bug free if possible?
We're a mix manufacturer, so we all know what happens with flour, and most of my stuff is 80%ish flour. It's only happened once in my time here, but these things can and will happen. For me the product was past the date on the packaging, but I still replaced it with fresh and made nice, you know, kissin hands and shakin babies. PR i believe they call that...
I've seen people excitedly accept free things you wouldn't believe. Free is a great motivator in most human beings, no?