https://skyairbus.com/blog/how....-to-cancel-and-refun
If you need to cancel or refund an Aero Mexico flight, there are a few things you need to do. First, you’ll need to contact the airline to let them know.The only thing passengers need to do is call, Aeromexico customer service, at – +1-800-237-6639 or OTA: +1-800-971-7347