Heh. My worst experience with customer service was at CDG. There was an intense flash storm which knocked out the RER on the way. They sent shuttle buses, but it delayed things and by the time I got to the counter it was only fifty, yes 50, minutes to departure. No go they said, one hour minimum. I argued, but they were firm. I asked to be put on the next flight, nope - you need to buy a new ticket, at the outrageous last minute price. I declined and went over to customer service. Same response. Fifteen minutes of arguing later, with me barely restraining myself from screaming, they finally agreed  to give me a spot on another flight, for a mere service charge of a couple hundred francs (this was a while ago). In the meantime a large line had formed, with considerable confusion going on with the other customer service agents. It turns out that the Air France customer service office in the international departures area had zero English speakers.  Oops. I ended up half volunteering/half dragooned into spending the next hour and a half as a translator. That and pacifier, since they tried to extort the price of a new ticket from every single person, and some didn't manage to restrain themselves from screaming and cursing, whether in English, their own language, or both, as applicable.

The French living up to every negative stereotype. Which is very rare in my experience, and I've been to France, hmmh, I guess in the literal sense of crossing the border and back it would be hundreds of times.