Task: Analyze the tweet's emotional expression, classifying it as 'neutral or no emotion' or as one or more of the identified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best represent the tweeter's emotional state.
Tweet: What is the point of @DPD_UK giving 1hrdelievry slots when they are over 30mins late so far and no notice or update. #unhappy
This tweet contains emotions: 