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: @Uber very disappointing that support has not responded to my email!! #bad #uber #service
This tweet contains emotions: 
anger, disgust, pessimism, sadness