20 lakh is 2 million? How did you come to the conclusion that it is equivalent to 220€?
Reouting a passenger after misconnecting onto an airline is governed by a few rules, mainly the IATA resolution 735d:
https://www.iata.org/contentassets/e...25june2020.pdf
In your case AI cannot just rebook you onto any available space on any carrier. They have to request space and wait for an endorsement if the receiving carrier is not part of their group or part of the star alliance. QR has no association with AI, so your request probably was not endorsed.
Normally passengers impacted by misconnects/irregularities should be fed and watered, but this can only be enforced using the local regulations that apply. In your case the 'duty of care' under EU261 will not apply since you started your journey outside the EU on a non-EU carrier. The only applicable rule is the DGCA which in your case will only direct AI under CAR section 3 M
3.8 Facilities to be offered to Passengers
3.8.1 Passengers shall be offered free of charge the following:
a) Meals and refreshments in relation to waiting time.
Delhi operations are badly disrupted by fog, so they will pull this clause:
Additionally, airlines would also not be liable to pay any compensation in respect of cancellations and delays clearly attributable to Air Traffic Control (ATC), meteorological conditions, security risks, or any other causes that are beyond the control of the airline but which affect their ability to operate flights on schedule. Extraordinary circumstances should be deemed to exist where the impact of an air traffic management decision in relation to a particular aircraft or several aircraft on a particular day, gives rise to a long delay or delays, an overnight delay, or the cancellation of one or more flights by that aircraft, and which could not be avoided even though the airline concerned had taken all reasonable measures to avoid or overcome of the impact of the relevant factor and, therefore, the delays or cancellations.
The fact that flights 'took off and landed normally' will have no bearing on the case as Delhi is under bad fog most of the time in winter and only aircraft with the correct CatIIIb equipment and crew rating are allowed to depart. The weather history is here:
https://metar-taf.com/history/VIDP
The regulators guidelines are available in the know your rights (KYR) page:
https://www.dgca.gov.in/digigov-port...YR_portal.html
Normally you have to file a complaint with AI first claiming costs for the flight disruption here:
https://www.airindia.com/in/en/conta...category-items
Then if the response is not to your satisfaction you file a 'grievance' with the regulator in the Air Sewa portal:
https://airsewa.gov.in/home
Doing a chargeback with your credit card will get you no where as the airline transported you from A to B as originally booked.