Sanchi Milk — My milk turned sour

Few days ago, I purchased three packet of sanchi milk and when I boiled the milk, My milk was torn.i needed a milk but my milk was torn. If you don't give the good milk so please return my money if someone drank the milk it cause a serious health problem. What should I do for this. 😠😡😤😠 WHAT A WORST SERVICE OF SANCHI