Instruct: Classify Amazon reviews into positive or negative sentiment
Query: worst experience with a compsny through Amazon

I ordered this Blue=ray disc from a company through Amazon and NEVER received it or any communication ever from them even after three e-mails. I have gone through the Amazon AtoZ guarantee and want my credit card credited for this purchase. It has scared me away from purchasing on-line from a company even if it is oked by Amazon. Hopefully , by July 4th I will have gotten my money back and will at least have my faith restored in Amazon. The company was called Undercutters and then later called Cannot Remember. I have bought through Amazon for years and this is the first BAD experience, but I want my money back.