For the 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", classify the emotional tone using the following list: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotion is discernible, state "neutral or no emotion".
anger, pessimism, sadness