PANTRY BUGS IN FOOD!!!!!

Its been quite a few years now, but I am finally speaking up. I am sure the store management wont do anything about it. The flower, corn, mieliemeel etc are always ridden with pantry bugs. I have had to dispose of so much food. Unfortunately I buy in bulk and HAVE to buy at Shoprite for the company. How can a store not notice that? Worst of all my huge pantry also gets infested and I have to clear everything out and dispose of extra food that have also then gotten infected. I am so dissapointed!!!