Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not happy!

Bought one and did not work, returned for another and also did not worked.I called for assistance and tried and tried but ended returning it. I also bought one for my daugther for Crhistmas and told her not to even open the box and try it, so returned too. Amazon had credit me for one W. Robotic but still waiting for the credit on the one I bought for my daugther. I bought 2 together and returned them also together. Don't know why I am not getting the credit. Bad experience...