MakeMyTrip India — gst invoice not received

Address:

Mumbai City, Maharashtra

Booking id: nh[protected]
Made a travel on 25th november. While making the booking, i was being charged rs. 1590/- approx towards gst charges. However, the agency is not ready to issue the invoice at all. Have lodged complaints dated 27th november, 3rd december, 7th december, 12th december, 20th december. None have reverted back with the invoice and everytime they say they are working on it and will take 3 working days. I want to understand what are they exactly working on just to raise an invoice. I assume there are real big issues with the booking agencies with respect to gst compliance. Hope the issue is resolved at this stage or else will have to mark a mail next to gst seva.
Email id: [protected]@gmail.com