I know, but that's not a big issue. The problem is only with credit card bill payment through Mobikwik, right?
There are alternative apps available like Paytm, Billdesk, Freecharge, PhonePe, etc.
For shopping on Amazon, it's working fine with instant discount (SBI Just need to enable Pragati card BIN on SBI offers) — what else do you need? Besides, there's no real benefit in loading wallets or paying bills directly using a debit card on Amazon.