Business ProfileforChina Eastern Airlines

I booked the air flight ticket of China Eastern Airlines through Expedia on January 17, 2020. It's business class, and the round trip from ********* ** to ******** Pudong with departure on Feb 23, 2020, return on April 4, 2020. China Eastern Airlines charged $4,026.91 to my credit card.The first flight was cancelled by the airline due to COVID-19. It was rescheduled to April 14-June 6, 2020 by China Eastern Airline, but it was cancelled again because the close of border between and *** and China. Nobody with ******** passport has been able to travel to China without special **** ever since. Even today most ******* ********* couldn't go to China without special approvals by ******* Embassy.The airline issued the credit of $4,026.91 on April 9, 2021, because of its cancellation. However, I couldn't use the credit through Expedia or through the airline. The credit was no good, that's why I have called and contacted both China Eastern Airlines and Expedia more than 20 times for a refund. It was not successful. After I filed the complaint at the airline website, its customer service representative ****** (*************************************************************************) sent me a few emails but there's no refund.Now even the credit was gone in April 2022. I contacted them again on October 20, 2022. Expedia team have also contacted them recently. However, I have been told by Expedia that the money is gone, and no credit is available. I have called the airline more than 10 times through their contact number #************. Expedia has emailed me that they have contacted the airline and made efforts to get me the refund too.The ticket number at the airline is: *************.In this case, the airline (Stock "CEA") has treated its customers terribly. As an ******** citizen, with the money or credit gone like this, I have felt that China Eastern Airlines has robbed me so much money, that's much worse than the bank robbery, because I have used Expedia which is a big company, and I have done nothing wrong!