Two thoughts:
1 - I'm always amazed (not really) that when I make the purchase it hits my card immediately. But - returns or cancelations take several days.
2 - I always hate it when the internet version bombs out and you get stuck in some endless 'do loop' without recourse and have to make The Phone Call.
They always start with "you know - you can do this online".
My response is always "You'd like to THINK THAT, wouldn't you!!"
Reminds me of the Seinfeld episode where the rental car agency lets his car go even though he has a reservation.
The lady says "I KNOW what 'reservation' means..."
He says in his distinctive Seinfeldian inflection: "I don't think you do; if you did, I'd have a car right now!"
K