United airlines Discrimination against me and my wife age gap relationship

I don’t care how you feel about us but the way United Airlines made us feel today it was an insult to injury my wife got sick we couldn’t get her not to eat and I was lied to and told my car wasn’t on file when I know for a fact before I got on the plane and before I booked a round-trip flight that make sure the car was attached to the file because it tells you on the app that you cannot pay for anything with card on the plane the more you have to buy through the app my wife is 62 and when it comes to us by a snack box we have to consider can drop anything and my wife sometimes eat salty or sweet but this woman really rubbed us so raw and it was insult to injury I wouldn’t wish that on my worst enemy because no one should be discriminated because of their love