Parle — Biscuit Quality

I bought a packet of hide and seek biscuits from reliance fresh, on opening it, I found the chocolate layers were white in color, on careful examination you could see a fungus like formation on biscuits the batch no is PN 198 B and packing date is 19/1/21 the biscuits were opened in fully packed condition.

My question to the company is,
What are the quality standards which are mandated for packaged food products.
I already have consumed 4 packets of this product in the past weeks! Does the company have no social responsibility towards the society?
This is a serious breach of quality. If some mishap occurs due to substandard quality of biscuits the company (Parle Ltd) is morally and ethically responsible. Kindly ask the company to justify?