Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sharp YO-520P Memo Master

I purchashed this product in the spring of 2010. The product starting losing pixels with each week of use. It is now 4 months later and the product is essentially useless because there are so many pixels missing I cannot read anything that I programmed into it.When I contacted the seller about this problem after 2 months of use I was told that I was trying to scam her. I am the one who has been scammed, as I purchased a defective product that is now unusable.