Indigo Airlines — Pnr BH4SXF refund of ticket without cancellation charges

Booked ticket on 13.6.2021 for delhi to madurai travel on 5th July 21 by flight no.6E2169.(PNR BH4SXF)
Intimated on 16th june that the flight is cancelled due to operational reasons giving option PLAN B to reschedule or cancel.
on 16th over phone ( quality of phone was inaudible), i may prefer for 3rd but i will confirm.
ticket was issued on 16th june for flight for 3rd august.
due to the pandemic situation my presence to my family members in delhi is highly necessitated so initially i inclined to leave on 5th july for some unavoidable work at my native place, madurai.
everything happening because of stoppage / cancellation of flight on 5th due to operational reasons (what is operational reason is beyond to comprehend). my absence here in delhi will dearly cost my family members leaving many doubts who will take care of members of my family. we hailed from tamil nadu, have been living in delhi and do not have any relatives in delhi.
kindly consider opting for PLAN B cancellation without any cancellation charges.