Hindustan Unilever — Pears Soap FAKE!!

My father has been using Pears for more than a decade now but off late we have come across a lot of fake ones. A particular batch of Pears Bathing Bar (pure and gentle) smells more like phenyl and has caused skin reaction on my father's body. This is a huge disappointment.
I hope there should be some solutions regarding this complaint
Product no- F 2 C4
Manufacturing date- 06/05/20
Expiry-4/05/22