Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lousy customer service

What's with the missing parts that I and other reviewers have experienced? What's going on in their packing and shipping section? I'm afraid I didn't get the royal treatment that another reviewer got, whereby they shipped his missing parts overnight. It's been nearly three weeks since I first called, and I can't ride my bike properly because of a missing front break cable. They replied to one of my emails after I called, but usually they don't bother to reply at all.