If the company does not reply to me or I do not agree with your reply, how can I file a complaint with AESA for cancellation, delay, denied boarding, change of class or PMR?

You can submit your complaint online to AESA from your own address by filling out the form found on the AESA website. You will need to have the documents that will be indicated to you when accessing the online presentation in digital format in order to be able to attach them.