Flipkart — Flipkart is not delivering products to my pincode

I have been purchasing from flipkart at 691310 for almost 3-4 years now with no issue at all. Suddenly almost 80% of the items from almost all the sellers went to Not Deliverable status / Currently out of stock for 691310 about few days ago. But when I check the same product for a pincode almost just 2kms away I.e. 691312 it's showing available. HOW SUDDENLY ALMOST ALL THE PRODUCTS went to Not Deliverable status for the first pincode. This is true for same product for multiple sellers. Both these pincodes are in the centre of town. This doesn't even make sense. Flipkart is not even acknowledging the issue at their end and is giving a very generic answer that we are expanding and blah blah blah.