Have you tried changing the aspect ratio for your photo by editing the product page? I had the same problem, and changing the aspect ratio fixed it. To do this, open the product page, click "edit design" from the edit dropdown, hover over the product and click "edit section", click on "aspect ratio" and select one of the choices. You might have to experiment to find the aspect ratio that works. I hope this advice helps, and that you haven't already thrown away your website. It took me 5 months, and a whole lot of trial and error, to make my website. It's definitely the hardest DYI project I've ever taken on.