Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can I get a refund?

Uh, I had to walk two miles home in the "cold"... because this lock doesn't work as soon as it dips below 45 degrees? My key seized up in the lock at a temperature well above freezing? Sorry, I can never trust the mechanism again. Won't re-use unless I'm sure I don't need my bike for a while. I'm serious about the refund.