Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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