If your travel plans have changed, Expedia offers options to cancel or modify your reservation, subject to the terms and conditions of your booking. To initiate a refund, promptly contact Expedia\\\’s customer service at . Their dedicated team is available to assist you at every stage of the refund process, ensuring a smooth experience.
Source: https://developer-community.sage.com/topic/3136-how-do-i-get-refund-on-expedia/