RR_study
Hey so I tried entering a different card's details on the payment page but it says that "The credit card cannot be processed as entered. Try again." Should I be entering the name and details of my father in the billing information page as well that appears prior to the payment page. Wanted to confirm that billing details page shall contain candidate's details or the card holder details?
You should try entering your father's details (in "billing information"), as the payment processor may be verifying address details in addition to CVV. If that doesn't work, try using a card that doesn't require an SMS code to be entered.
Finally, don't worry too much about this. Just make sure that in your GMAT profile, your name, DOB, and citizenship are entered correctly.