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: @lebara - worst possible decision I could have made when arriving in the UK. Shocking service. Poor coverage.
This tweet contains emotions: 
anger, disgust, sadness