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: @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