You can't always control your feelings, but you can control your actions. Let yourself settle down, and then ask politely. If it's an oversight, they'll work

You can't always control your feelings, but you can control your actions. Let yourself settle down, and then ask politely. If it's an oversight, they'll work to correct it. Nobody with brain cells wants to piss off someone they just hired in this market. If they don't work to correct it, well, then that's also information. Go back to job searching.