Pepsico India — Fungus in Doritos

I have bought a new sealed packet of Doritos Nacho cheese from the market and when I opened the packet of Doritos Nacho cheese, found that there was fungus and all the Doritos chips were sticked to each other and very foul smell was coming up. The packet was completely sealed and puffed.
The expiry date on the packet was of 18/08/2023.
Kindly look into it and take appropriate steps on this and I have attached the images too and I have already disposed the packet.
Waiting for the solution over this.