Give, E-Mail Access first and make sure Statement is present in the inbox.
E-.mail should be original E-Mail from Bank's end.
Then , When you go to Credit Card Payment section in Mobikwik, On top right corner there is "ADD Card " option and enter your Card details again, if Statement from bank's end is Present in your linked E-Mail's Inbox then Mobikwik would fetch it.
Now you can apply full pay
Earlier , I too face the same problem which you are facing. Follow above steps, it will get resolved since it works in my case.
HDFC, BOB, AXIS , Indus and SBI works smoothly for fetching Bills from E-Mail