Flipkart — Nearly all the products are not deliverable or out of stock

I have been trying to order a few products and continuously being shown “not deliverable” or “out of stock” for almost all the products, Flipkart has to offer. The pin code is 201001. I have tried using other pin codes (nearby ones) but to my dismay, no success in that regard either. Nearly all the products irrespective of the categories, that is, fashion, technology, books, furniture, literally everything, is either not deliverable or out of stock! I have been seeing similar complaints from other customers. I wonder if there is a problem with the website. Especially, something like this happening around one of the biggest sales of the year is quite bizarre. Please, Flipkart, look into it as soon as possible, I want to buy stuff!