Priyagold Biscuits — I am complaining about adulterated synthetic thread like product found in Priyagold Butter delight biscuits

As today, I was eating priyagold butter delight biscuits and suddenly i found a synthetic thread like substance in the biscuit. This substance was not at all edible and i have kept that part of biscuit as evidence. Please work on this complaint and provide me proper compensation or I'll have to move to Consumer Forum for the same.