Here's one of, if not the TOP hated phrase:

"Your call is really important to us."
AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!
BS. If my call was REALLY important a human being would be answering it.

A close second is "Please hold" Hey, you answered the phone so deal with me. If someone is ahead of me, deal with them, then answer my call.