Eclipse Kendall Modern Blackout Curtains, 95 In Long x 42 In Wide, Grey, Sold as a Single Curtain Panel

I bought 4 panels and when I went to hang them up, there were many little holes on the white backing, which allowed the light to filter in through the holes. They clearly hightligted all the imperfections and holes. I don't have the original packing and not sure how I can return these but will try. I need to find another pair but now reluctant to order from them again.