I Sat on Hold for Almost An Hour and 40 Minutes Only to Be Told The Call Could Not Be Completed And I'm Hoppin' Mad

Have you ever gotten one of those notices from the IRS that says something like, You owe us $10,000 but maybe you don't. Fill out this paperwork and tell us why or why not. Kthxbi."? I didn't exactly get one of those-I don't actually owe the IRS anything, much less $10,000; it's complicated-but something in that vein...