[Resolved]  Yatra Online / Yatratrip.in — ticket booked but later cancelled without informing customer

Address:

NPH 1 Aditya Mega City, Vaibhav khand INDIRAPURAM, Ghaziabad, Uttar Pradesh, 201010

I booked booked 3 tickets for me and my 2 kids through yatra.com from Edinburgh to New Dehi via Birmingham in April 2019. Travel date 26 June 2019.
Ticket issued and email sent to us. On travel date while checkin we got to know that ticket was canceled by yatra. We were not informed and neither was our payment refunded. Me and my 2 kids were stranded at Edinburgh airport without any information from yatra. We kept trying yatra Customer care number from airport from a landline but it was not connecting. It finally got connected from my mobile. Yatra Customer care first said that tickets are booked but later on cross checking they said that the ticket was successfully booked and issued but later due to some technical error at their end it was cancelled.

I was not informed by yatra about this. Neither was their any refund in my account which could hint me about the cancellation. I kept begging them for issuance of the tickets for me and my kids but no use. They were not ready to help me instead asked me to purchase a new ticket for next day which costed 4lacs.
This is pure harassment.
I want to sue yatra for the mental emotional physical and financial trauma that me and my kids went through. Please suggest.