MakeMyTrip India — Tax Invoice is not provided for my trip

Address: Hyderabad

I have taken a Kerala holiday package from Dec 1st to 5th from make my trip. They have not provided the invoice till now. If I raise a ticket they are closing it without any information. I could not see any option in the app and they had not sent any email. When I asked after paying the amount they mentioned it will be generated after completion of trip. I have raised multiple complaint but no use.