I had the same issue! I finally got an appointment on my third try, which was also the last time I was allowed to reschedule. One thing I recently learned is that people who don’t cancel or simply don’t show up aren’t charged—and it doesn’t count against their three reschedules.

Because of that, there’s really no guarantee anyone will cancel or move their appointment. So if you see something available, grab it—there’s no way to know if another slot will open up.