Parle — Parle G biscuit adultered

I bought 3 packets of Parle G biscuits of weight 250 g each. I would like to bring it to your concern that all the 3 packets had biscuits of highly poor category. It might have been adultered. It tasted like dusty/ sandy/ muddy taste as if sand was mixed in biscuits material. It’s highly injurious to health as it could have caused stones in kidneys. I have the remaining biscuits left with me for proof. This is really a serious concern as it is not only with a single packet but with all 3 packets I bought. See to it or else I ll have to complaint in consumer court! The biscuits could cause serious health issues.