I'm hoping for some expert advice from AI travellers on how to purchase a specific booking class on an AI domestic flight. I would like to travel next month from DEL to UDR in a specific booking class (G), so I'm able to maximize the points received on my aeroplan account. Given that I'm based overseas, I'm unable to purchase the ticket via an AI toll-free reservation agent, since (s)he is only allowed to take credit cards from India. Does anyone know of an online travel website, where I can purchase the ticket via a specific booking class? Amex Travel doesn't have an agreement with AI, given that the company doesn't accept this credit card and Expedia doesn't offer AI as an option either.

I don't understand why AI can't take the international credit card information from overseas guests and when you arrive in India, you show proof of the credit card and your identification to ensure that no fraudulent activity occurred, similar to Eva Airways policy.