Not able to add Amex Corporate Card as a payment mode in PS5

Hey everyone,

I'm trying to buy a PS Plus subscription using my Deloitte USI corporate Amex card on the India PlayStation Store, but I’ve hit a wall right at the payment mode screen.

The PlayStation Store is "unable to validate my card number" the second I type it in.

From what I’ve read, it looks like PSN India just fundamentally doesn't accept the American Express network (only Visa/Mastercard/Maestro), so the form is auto-rejecting the 15-digit Amex number structure entirely.

Has anyone else with a corporate Amex found a way to route this through a different gateway, or is it completely impossible to use directly on the console?