I booked some refundable flight ticket with Air France with the Flex option. I canceled them and I am now seeking a refund. I requested reimbursement for some flight tickets I bought on Air France via the link they gave in the email they sent me containing the ticket (https://wwws.airfrance.fr/trip/external):
However, I received no email confirming my request, so if one day the information disappears from the website, I wouldn't have any proof that I requested a reimbursement. How can I get some confirmation that Air France has received my request for reimbursement?

