Poor Management - Licensed Practical Nurse Mercy Employee Review

The manager of the office had no management background and as a result the office was ran poorly. Hardly any communication between management and staff. Office was consistently understaffed, which obviously wasn't a concern to management. As a result of being understaffed, I often worked with no lunch break and longer hours than what is required of me. Overworked and underpaid. When I gave my two week notice, the manager finally admitted that I was doing the work of two staff members and that there was going to be difficulty in fulfilling my position. I was told I had a promotion and that it would be effective immediately and the raise would reflect on my next paycheck. I didn't get that promotion until the day AFTER I gave my two week notice. Can't help but feel that promotion was only pushed through after a notice was given to cover the manager from any wrongdoing. I was also treated differently and poorly by the manager after I gave notice. Coworkers, including a temporary worker from a temp agency, approached me stating that the manager was speaking poorly of me behind my back. That is unprofessional, especially from a "manager".