indigo airlines - refund of passenger airfare without any deduction for flight cancellation by Indigo Airlines managem

The travel details of self (Mr.R.Krishnamurthy) and wife Mrs.Ganga Krishnamurthy, who are senior citizens, from Chennai to Varanasi and return:
onward
R.KRISHNAMURTHY & Mrs.GANGA KRISHNAMURTHY SENIOR CITIZENS INDIGO AIRLINES *E-***-**-*-**** *-*-**** @ **.** HRS. PNR NO.: OGJUS

Return
R.KRISHNAMURTHY & Mrs.GANGA KRISHNAMURTHY SENIOR CITIZEN INDIGO AIRLINES *E-***-**-*-**** **-*-**** @**.** HRS. PNR NO.: OGJUS
Indigo Airlines has cancelled all the flights from **-*-***** to **-*-**** . They have indicated that we can cancel and rebook the journey within **-*-**** without cancellation and rebooking charges .In view of our delicate health with a lot of ailments, we are not sure of undertaking the journey on a future date.For this request, Indigo says that cancellation charges will apply.India Railways have suo motu are recrediting the fare amount to passengers for cancelled trains at the instance of Railways. Same rationale must hold good AND VALID for Indigo Airlines also as the cancellation is at their instance and travelling or not on a future date is absolutely within our discretion and the airlines cannot dictate it.We request your august intervention to get full refund of the fare amount for the above travel itinerary without any deduction:
Regards
R.KRISHNAMURTHY & GANGA KRISHNAMURTHY