Honest seller who refunded me due to some misunderstanding
Had some misunstanding with the seller, as I was expecting that I should be able to validate the ticket on the airline's official website in the same way as any fully purchased tickets. After giving feedback to the seller, they have given timely clarification that the tickets are reservations only instead of confirmed booking, but should be sufficient to use for immigration or visa application. I didn't want to try that and the seller refunded me.