False advertising on product packaging & theft

I have been buying this food for 5 years 40kg per month. Twice the 40kg was not a 40kg as stated. I reported it. Then it happened again & I reported it to them. A mr Uys asked where I purchased it. I responded and have never heard from them again. It costs almost R800 for 40kg food but you get 35kg & pay the extreme price for 40kg. They are *****ing from clients & its false advertising!!! I don't support them any more.