Moderator: Hilton Honors, Practical Travel Safety Issues, Information Desk & San Francisco
Join Date: Jan 2001
Location: San Francisco CA
Programs: UA, Hilton, Priceline, AirBnB
Posts: 11,313
agree with those who say do NOT contest the charge
But it's also true that once you miss your appointment you cannot reschedule on line. I know this from personal experience.
They WILL call you, it often takes a week or more.