Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture 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