Indigo Airlines — Unethical Behaviour- Omission of GST details in tax invoice

For PNR JUTQPR, ticket was booked through Indigo website and GST details were provided while booking the ticket, however the same have not been included by Indigo in Invoice.

GST details are reiterated below:
GST NO: 30AAACA6412D1ZL
Company name: Airports Authority of India
GST email: [protected]@aai.aero​

Request for providing proper GST invoice was sought through:
1. Email through which invoice was received: No response from Indigo
2.Indigo Whatsapp help: Not helpful as attached

It is requested to provide proper GST invoice