Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Amazon should not be selling this item.

The bike is good while it was working. It only worked for several times and my son loved it. But then it stop working the bike still looks brand new. I was trying to see if my mechanic fix it and he told me that the part needed to be changed. I was late calling Amazon by 2 days to just return the item. They did not care about the product being defective only after several times of use and they did not want return my unit even though this was my FIRST time asking for a return after purchasing thousand and thousands dollars of merchandise. I though Amazon is much better than that