Thankyou so much priyanka!  My final registration has been completed. Thank you for your timely help

Did it occur automatically or you paid again ?

Hey aneeqa!
         It occured automatically. I didn't pay again. I just waited.it took 3 days for the successful transaction.
If your facing the same problem that the amount has been debited and the step has not been completed just wait for a day or two. It will eventually get completed and if not try to contact aiims helpline numbers.
All the best!