Consumer Redressal

Dear sir, I use "ease my trip" website to reschedule my flight (To June 5th). The system automatically capturing the date June 21st and even after I changed the date in the calendar, the refreshed flight itinerary came for June 21st. Mistaken this as June 5th, I booked the flight and ticket received and payment done. Upon understanding the mistake, I recorded the video of website error and informed the customer care. they are not ready to acknowledge it and saying they can't do anything. Please help me to solve it. I have done numerous mails and calls to ease my trip customer support. they are not ready to help and asking me pay again to reschedule the flight. Regards Anish Mon