I've earned 185,000+ American Airlines miles. I keep receiving correspondence that I will lose miles that will expire because of lack of use. Each time I fly, I ATTEMPT to use miles to upgrade from coach to Business Class because I'm disabled, and have had a blood clot and pulmonary embolism. The agent says there are no seats available. I told her the miles are useless because i'm not able to use them, but lose them. Nothing they can do all thevway to upper management. I changed to United and paid for Business Class. I intend to close those Citi Card accounts and earn points from credit cards related to United and Star Alliance partners.