Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It's waste money

I already wrote some note that lens motor made some noise when I got this lens. Two months after, a front part of lens which was moving for focus fell out of the lens. And then I can't put this back, I tried but camera said lens sensor error. I can't take a picture any more with this lens. Please Don't buy this lens. You may be waste your money like me. I don't know they can fix for me. Where can I contact???