Task: Categorize the tweet's emotional tone as either 'neutral or no emotion' or identify the presence of one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @redBus_in #unhappy with #redbus CC, when I talked with them before a week still they didn't initiate the refund of the transaction.
This tweet contains emotions: 
anger, sadness