I've been working as waitress for over a year Saturday morning I was late and a stand in manager told me to go home and to call the manager. I called the manager and he would not answer. After several unanswered call I sent him a text and said if he didn't get back to me I would have to call the general manager. Today he fired me for undermining him as a manager. He refused to answer my call. Can I be fired for this??