Cashback on train tickets booked via Smartbuy platform using the HDFC Swiggy card or suggest the better option

[anonym]

How much is the actual cashback (net after reducing the extra charges as compared to charges we pay on IRCTC via upi) we get on train tickets booked via Smartbuy platform using the HDFC Swiggy card? If anyone have recently booked the train tickets using the HDFC Swiggy card on Smartbuy portal please share your experience
Thank you