Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WORST EXPERIENCE EVER!

This was the absolute worst online experience. I would NEVER purchase anything from J&R; Music and Computer World ever again.This seller allows you to purchase things they don't have in stock.Guess what happens? You get an email 4 days later stating that your order has been cancelled, because "Amazon" oversold their product.They offer you absolutely no compensation, except asking you to come to the store and purchasing this for regular price.Now, I have a whole bunch of Zune accessories with no Zune.I purchased these accessories after receiving an email stating my order had been processed, when in reality, it was cancelled 4 business days later. So, in total I waited a week to find out that my order had been cancelled.I suggest "J&R; Music and Computer World" be reported to the Better Business Bureau for unsavory business practices.I suggest you go with another seller, they use Amazon as a scapegoat for the lack of their stock.