Yes recently mobiqwik started convinience fee on cc bill using debit cards.
Alternative is u can add money in slice wallet with your millenia debit card which will give u 1% reward on wallet load (upto 10,000₹ no charges).
Then u can use Fullpay code in mobiqwik and use other UPI app as slice and there u can pay through Slice wallet UPI.
After payment u can play slice game and earn some cashback.