Rideau de douche en coton

There's a seam that runs down a vertical line about 1/4 of the way across the shower curtain. I've asked for a replacement and the replacement came with the same seam but in a different spot. It's not even sewn properly, it's sewn wrinkly at the bottom. I love this thing though. It's beautiful and the colors are perfect, but the seam drives me mad.