Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Came with missing parts, vendor not helpful

I ordered a pair of wipers. One was fine. The other came with missing parts, which made it impossible to install. Contacted the seller, who asked me to contact the manufacturer to return and get a replacement. This is too much hassle for a $5 part. Most other decent vendors will simply send another non-defect one.Not satisfied with the service, and will not buy from this vendor any more.