Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified 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