[Resolved]  Mondelez India Foods / Cadbury India — rotten silk oreo chocolate

Address:

Gurgaon, Haryana, 122018

My husband bought a few big oreo silk chocolates from wh smith at the delhi international airport a few days back. They were supposed to be a birthday gift for our 10year old. We gave it to him as we woke him in the morning wishing him a happy birthday!
He was heartbroken the moment he opened one and took a bite. He ran to the bathroom to spit it out and had to brush to get the rotten taste out of his mouth.
The chocolate smelt of rancid oil!! I am shocked!!!
I have been a fan of cadbury chocolates growing up and prefer to give these to my children over any other brand. But it was shocking and disappointing to have come across this piece that was so rotten you could smell the rancid oil in the other room. I've thrown the other theee pieces away while keeping one in an airtight box that i would like to show you people.
How do you think that can be done? I hope to get a response to this message and redressal for my son as this spoiled his birthday morning.