It’s not the best day, but don’t let it derail you from the path you’re on. I guarantee these same callers would mock whomever didn’t sound like them. It could be an accent, talking too fast, too friendly, too preppy, anything. You just got that 1% call today. Don’t let it them into your head. As long as your job is supportive and you can transfer them for being rude, just follow those policies and move on to another call.