Mondelez India Foods / Cadbury India — Chocolate has weird smell

I have purchased Cadbury Dairy Milk Silk from a local bakery and when I opened the cover, it is very oily to touch and bad smell is coming. Also, the chocolate size appeared to be small and it was not in the actual shape it used to be.
This is the second time I am complaining abt it, earlier last year, I have the experienced the same issue.
I request you to respond accordingly so as to prevent damaged chocolates to be supplied for consumption by customers.
If no action has been taken against this complaint, I would like to approach consumer forum.