Disgusted customer!

Last week I bought two 2 liter Crystal Valley milk at Checkers at the Diamond Pavillion Mall in Kimberley. When I got home and used it both of them were sour. I have called Checkers and also lodged so many complaints. Checkers always just ignores us. I am utterly disgusted with Checkers service and quality of their products. I will never shop at Checkers again!!