LOL ~ I feel for ya! I've known that frustration too.
The store manager has no control over the little bug that was probably just napping, minding his own business, and then his nut apartment got picked and packaged. He had nothing else to do so he started a family in his little world. Then you found him! LOL
Seriously, these things happen. It's not the manager's fault...it's just one of those things. Fruit flies like fruit, nut bugs love nuts, weevils love flour, kids love Skittles....it's not that unusual to find pests in your food from time to time.
