Indigo Airlines — lost baggage and received after 15 days

I booked ticket for my mother who is senior citizen. While her travelled, due to Indigo system down we lost our baggage. After followed up multiple times, we received baggage after 15 days and many times they don't reply over email.
Today on 16th day, I got a call for compensation of poor service, they told me that we will allocate 3000 INR to the person only, we can't allocate that to profile from which account ticket was booked. My problem is since she is senior citizen hence she can't travel, so compensation amount should allocate to the profile.
I booked the ticket for my mother, I followed up for the baggage, due to lost luggage I extended her ticket. All expenses I have done due to bad service of Indigo, but now Indigo saying that we can allocate travel voucher on her name only.
Indigo should deposit travel voucher amount to the booked credit card/debit card or should deposit to profile from where ticket got booked. If you can't do that, then do not cheat the client to create profile for travel benefits.

Date of Incident: 25 Nov 2019
Client PNR: RJML5T