Task: Assess the emotional content of the tweet and classify it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's mental state.
Tweet: @bt_uk appointment booked between 1-6 today, waited in all day and nobody showed up, also requested a call back and never got one #awful
This tweet contains emotions: 
anger, disgust