Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Zero help from @ups customer service. Just pushing the buck back and forth and promising callbacks that don’t happen.  #loathing
This tweet contains emotions: 
anger, disgust