Im fired

My child been sick vomiting at school so they wouldn’t let her come back until 24 hours. I called my job to let them know I wouldn’t be in so they would have more than enough time to fill my shift, I was told to get a doctor note etc. so I went into my job today and there telling me that I don’t work there no more, I didn’t get a call or anything he proceeded to tell me I was a no call no show when I have proof that i called in. Im so irritated because why lie about it