BookMyShow — Book cruise from Book my show which got postponed, following up for refund from last 2 month, but no response

Address:

Big Tree Entertainment Private Limited Ground Floor, Wajeda House, Gulmohar Cross Road No. 7, Juhu Scheme, Mumbai, Maharashtra - 400049

I had booked Cruise from Book My Show via Booking ID - BEGG017KH63NQE.
I reside in Delhi. Cruise was to depart from Mumbai to Goa on 13th Nov 2021, but got postpone to 22nd Jan 2022 just 3-4 days before 13th Nov.
I cannot make it to 22nd Jan dates so I asked them to refund my amt. of Rs. 56288.32/-. The customer care does not pick up calls and I have put mails to [protected]@bookmyshow.com, [protected]@bookmyshow.com, [protected]@bookmyshow.co, [protected]@bookmyshow.com, sunburn.[protected]@bookmyshow.com. But they only reply with we are looking into it and then nothing happens .
I would like to take a legal route against them, being such a company bookmyshow is playing with my money.

I had also given my last mail to Book my show stating that if my money will not be refunded I will take legal route.
But they are not serious against that also.