Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @Activehours I need someone to reply back to me immediately. I am not happy and not getting timely responses through the app! #help
This tweet contains emotions: 
anger, disgust, sadness