Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @Avanquest i have unsubscribed 3 times from your spam emails still coming? STOP THE EMAILS #avanquest #software #terrible
This tweet contains emotions: 
anger, disgust, sadness