Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: I ordered a specific product from a specific manufacturer, a halo chinstrap from Sunset Healthcare. This vendor made an unauthorized substitution, sending a non-adjustable chinstrap from Legend Medical Devices. When I went online at Amazon to arrange a return or exchange, I was informed that this product is not eligible to be returned. This is a ripoff. I'm stuck with a product that is useless to me, and cannot get my money back.

Was not what I ordered. Not eligible for return. No refund available. Very unhappy.