Super white maize meal no quality control. Sour hard ***** render it useless

Don't make a change to super white products. We have purchased now 3 10 kg bags of maize meal to find massive big hard sour ***** in the bags. We have a family of 11 to feed and can not afford to throw away food like this. Botselo mills has no quality control obviously. These companies need to run their businesses properly, specifically when there is food concerned. And as I said this is not the first time this has happened with there products.