Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unfixable printer jam !

This printer jammed after only 12 pieces over a period of one month. It happened the day after I disposed of the packing box. It has been checked by a lot of techs and now I don't know how to return it or where to return it. Nothing against Amazon but I could find no paperwork in the package telling me how to return it.