Disgusted with White star maize meal

Bought a 10kg bag of maize meal. Opened when I got home, only to find that the bag was infested with insect. NB this was a sealed 10kg pack. Wth? So now I'm expected to eat this, take it back to the shop and keep this infested bag overnight. Quality important and this company couldn't care less about as they've already pocketed the funds. Disgusted