I flew from Bangkok to Delhi using an Indian budget airline called Spicejet. When I called the agent to book the flight while doing it on the phone at the same time, however even though it said the payment went through it also said the flight wasn’t confirmed.
The second attempt I made was just by talking to the agent and then he said it went through. He said I would be refunded the extra charge but a few weeks later and it still wasn’t. When I called Spicejet they refused to refund it so I called my credit card company who refunded the transaction, too bad for spicejet scammers! Avoid this airline like the plague!