Determine the emotional tone of the following tweet: "@SalterUK second pair of scales I have bought that have stopped working after battery change. Is this an issue you are aware of?  #unhappy". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
anger, pessimism, sadness