United is officially the WORST airline ever and I have vowed to never fly them so long as I live. Never. Ever. Their ticket counter people? Horrible.
The last time I flew United was with my husband (then fiance). We were going to India. For our wedding. In several days. The ticket counter woman wouldn't let him on the airplane because she said he didn't have a proper visa for flying through Frankfurt. He didn't need one. He told her, and proceeded to pull out a letter from the German Consulate in LA which stated "You don't need a visa to fly through here to India."
She replied: "I don't care WHO you got a letter from, I'm not lettin' you on the plane!"
Twenty minutes later, we convinced her to let him fly to Chicago, our layover, where he would recheck-in for our connection on Lufthansa. She yelled "They'll just tell you what I"m telling you!"
They didn't. She was wrong. But thanks to her antics, he got a seat assignment far away from me and we had to sit separately on the 10 hour flight.
When I wrote to United to complain (informing them that if she had succeeded in not letting him on the plane we would have MISSED OUR WEDDING) I never heard back from them. Ever. Nothing. No email, not apology, nothing. Which is why I am never flying their shitty planes ever again.