Cancellation of the flight segment/airline ticket is done according to the terms and conditions of the airline where it was issued. In the case that one of the component flights of a combined flight is canceled by the airline, a refund can be made for that flight, but the other flight segments remain valid and cannot be refunded.
If you have chosen the Fast Refund service, the refund for the canceled flight segment by the airline will be processed within a maximum of 24 hours.