it cleared up for me today at work when i was searching for a date value on a lab system with random bogus dummy data a program threw in there that only stored the last 2 digits of a year and had to figure out if the dummy birthday years in the test data were 2014 or 1914. then i said to myself "oh, that's why that was such a big deal"
care free? papers and finals and other bullshit? no thanks, work is WAY easier to deal with than school ever was. no tests, no papers, and you actually get paid to be there
honestly i've dealt with bullshit fees before, and honestly it's not worth the 2 hours on the phone fighting it. the person likely can't/won't resolve it and you're wasting your breath. they can call a collector on you which will cause your credit to shit the bed. i'd pay it and then fight for a refund since at that point they can't threaten you with legal action
if they're big enough they won't care, that's why i said that it depends how much you really want to fight it. they might say too bad pay anyway and you'll be on the hook for the money.