CheapFareGuru.com / AirTkt.com / Eros Tours & Travel review: Customer service on airline ticket purchase

In my opinion this company has the worst customer service!I was trying to book a flight for my brother to fly with my Mother to Europe. I was doing this as a favor to my Mother since she cannot deal with working on computers. I booked the flight - used my mother's credit card, followed the 3 step instructions that they gave for confirming charges to your credit card (which included verifying a $1.57 dummy charge to verify that you are in control of your card). My brother received notification the next day that there was an issue with the payment - he called the number and tried to pay for the flight with his credit card. The customer service rep told him he could not do that and the flight was cancelled and hung up on him. I called their customer service and, after a very long wait, got a very rude person (might have been the same one he talked to) and she told me I could not pay for the flight with my credit card and that the flight was cancelled. I asked her why and she said that it could not be done. I said this is the first time I have not been able to pay for a flight with my Mom's credit card with other online booking sites. She told me to go ahead and go to those sites. I told her "this is BS" and asked to speak to a supervisor and she hung up on me. I have gone with another provider and got great customer service.