[Resolved]  Yatra.com — Yatra.com did not refund for cancelled air ticket

I booked a flight ticket on 24 November, 2020 for my travel to Johannesburg, South Africa on 5 January, 2021 via 'Yatra.com' travel agent. The booking reference number is[protected]. The flight was cancelled by the airlines. Following that I asked for a refund to 'Yatra.com'. 'Yatra.com' replied with an email on 4 January, 2021 mentioning that it would take 45 to 60 working days for the refund. I have added a screenshot of that mail for your reference. I got another mail from 'Yatra.com' on 30 January, 2021 saying that the airlines would not refund, rather would give a free date change option till 31 December, 2021. I replied to that mail for a clarification on the date change option. I got no response to that.

My travel plan got changed after that - I had no plan to go abroad. So, I send another mail asking for a full refund on 23 September, 2021. 'Yatra.com' replied to that again claiming that full refund is on the airlines's end. I find 'Yatra.com' claim baseless due to the following reasons.
1. My travel to Johannesburg consisted of two airlines: Vistara (UK - 708) and Ethiopian Airlines (ET - 687). How is it possible that both airlines asked for a date change option? I checked with the Ethiopian Airlines. They asked me to contact to the travel agent.
2. Since I booked via 'Yatra.com' without directly contacting to the airlines and the flights were cancelled, Yatra.com is bound to refund me. Why should I bother whether the airlines is suggesting something or not?

I am supposed to get 43, 374 rupees which is a big amount for me as a phd student. Please look into this matter as early as possible. I have added the ticket, yatra.com's response for your reference.