Recently SBI Cards offered me a travel agency, arzoo.com, which had special discounts on air tickets. And in an emergency I booked a ticket online. No confirmation nor e-ticket came. But the consumer executive Sandeep Lade phoned me and said that the air fare offered was not actually available, it was there by mistake. He said he was reversing the transaction immediately. So I went for the next lowest fare and booked another ticket. This time the e-ticket came. Some hours later I again confirmed with Sandeep that the earlier transaction was reversed.
But in my next month's SBI Card statement both transactions were billed. Yes, one amount for no ticket and one amount for ticket. My requests, follow-ups and outbursts failed both with SBI Card and arzooo.com.
I lost the money and peace of mind. Well, you may please be careful with online ticket booking.