Flipkart has mentioned on their rewards store that ₹5000/- GV offers will expire on 31st Oct, 2020. In my opinion, they will not extend it further. However, they may extend it by using 3500 so that no one can reach there.
Some T&C, they have mentioned to use GV which I highlighted in images.
1) no other offer should be combined with GV
2) no another GV purchase
3) no refund in case of return
Ignore all tnc. It’s just a normal Flipkart 5000 Rs voucher