React Pegasus Trail 4 Running Shoe (Women)

I purchased this pair of Nike Pegasus trail running shoes for walks and leisure wear. I own a pair of the non-trail Pegasus that I use for running. However, after using these trail shoes for 3 months, they developed tears in the upper material next to the last eyelet. I attempted to return them at my local Nordstrom Rack and was rudely denied by the store manager. She stated that the return policy was for 30 days and the product had to be in pristine new condition for resale. She didn't consider the issue that only a manufacturing or material defect could've caused the tears. Disappointed in Nordstrom and in Nike's quality.