Poor material

In September i purchased Calvin Klein underwear and WOW Im starting to believe that they sell **** products to online buyers and the originals in store. First when I received my order I opened the package and found that the one panty was thorn I couldn’t return it cause my daughter removed the tag. It’s only been two months but the threads are shredding and the elastic is now exposed. I’m certain this is **** cause I have purchased Calvin Klein and this has never happened