Very complicated. First do a recharge of ₹200 with code CRICKET. Then after 48-72 hours. They activate cashback offer on which you need to recharge minimum of ₹200 without any promo code on which you will get ₹20 back as cashback on 2 recharged done until 10th November 2020.
I got FLAT25 on Paytm.
Rs 25 flat cashback on Rs 48 recharge / bill payment.
Valid till 31-Oct-2020.
Account Specific offer. I have got this in Sep'20 and Aug'20 as well.