Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bait and Swithc

I've had my Romba Discovery for about a year, and its worked pretty well. Now the battery is dead, and Irobot won't replace it. They say the batteries are on back order, but offer a discount for a trade in. It's been 2 months since I ordered the battery and Irobot can't tell me when I can get this replacement part, but they can offer a good deal on a new unit. THIS IS CLEARLY A BAIT AND SWITCH AS WELL AS A DECEPTIVE BUSINESS PRACTICE. THIS UNETHICAL BEHAVIOR MEANS I WILL NEVER DO BUSISNESS WITH THIS COMPANY AND I ADVISE EVERYONE TO AVOID I-ROBOT.DO NOT BUT THIS PRODUCT.