Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: @lebara - worst possible decision I could have made when arriving in the UK. Shocking service. Poor coverage. #unhappy
This tweet contains emotions: 
anger, disgust, fear, sadness