Here is the refund lufthansa Policy for the passengers. Lufthansa Airlines is the flag carrier airline and is the largest airline (along with the subsidiaries)....
https://cheapairlinesfares.com/blog/how-to-get-a-refund-from-lufthansa/

If you have successfully cancelled the Qatar Airways flight, then you shall not be provided with the refund for the same on its own. To....
https://cheapairlinesfares.com/blog/how-do-i-cancel-and-refund-at-qatar-airways/

When you wish to cancel the flight tickets that you have booked in KLM airlines, then you will have to read the KLM flight cancellation....
https://cheapairlinesfares.com/blog/how-do-i-cancel-and-refund-at-klm-airlines/