Dude it's just Weevils, get a grip lmao, they get into anything and everything.

i always put my cereal box in a big ass zip lock the moment i get it home, same with rice and flour. They can be on the shelf one night and attract them.

With rice all isn't lost though, just put your rice on a plate. and put your rice out in the sun for a little while, and they scram, wash rice (which you are meant to do anyway) and cook away. Flour and all that is more tricky though.

Don't blame carrefour for the existance of bugs.

Unless you let me blame Megamart for the existance Prostitutes.