Warranty Replacement Coat

I got a new coat a few weeks ago, and some of the stitches are already loose.  It was lucky that I kept the receipt.  After talking to the customer service, I took the coat back.  Except the replacement I got actually had some factory error!  Another dud, not structural per se, just a bit of an eye sore.  I will give it a good breaking in the rest of the month, and I don't be shy in taking it back.