Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: I’ll never know how good this product is because when they shipped it to me, it was missing the main gate door. I called and left a voicemail with the company and they never called me back. I will never buy products from this company ever again. I’m extremely disappointed. What a waste of money, what am I supposed to do with only three sides?

Missing pieces, customer service never called back