So, I just purchased these textured tights from Nordies. Today I went to try them on, and when I tugged at them to pull them up, my fingers went right through them in three places. Is that me being overly aggressive with my tights? Or should I ask that Nordies takes them back? They're Spanx, so I expected them to be of relatively high quality.

I'm not so great at being pushy and demanding about things like this, so I need some perspective. Thanks.