Pottery Barn I PURCHASE TWO IDENTICAL CHAIRS TO BE PLACED IN THE SAME LIVING ROOM. THE TWO CHAIRS ARE DIFFERENT San Francisco CA

I PURCHASE TWO IDENTICAL CHAIRS TO BE PLACED IN THE SAME LIVING ROOM. THE TWO CHAIRS ARE DIFFERENT. When I contacted Pottery Barn, they said because I accepted delivery , they are not responsible. I have a Receipt that clearly shows two Cardiff Upholstered Aimchairswith performance suede was ordered. Item # 7602741

One chair has nailheads and the other does not. . I ordered two of the same chair. I was not home and had a friend accept delivery while I was at work. This clearly  was a manufacturing error but pottery barn would not stand by their merchandise.