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: @virginmedia shocking service for your call centre staff this evening. Transfer me and cut me off after waiting forever to speak to someone.
This tweet contains emotions: 
anger, disgust