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: Can't believe @virginmedia are putting their prices up!! They already know I'm struggling to pay my bill &amp; won't change my package!! #raging
This tweet contains emotions: 
anger, disgust