I Wore Nike Shoes Six or Seven Times, They Are Falling Apart

Bought these shoes back in September, been using them as my backup kicks. Lo and behold, just two months in, and the mesh on these things is falling apart. Wore them like six or seven times, and the darn mesh started giving up. Took 'em back to Boyner store to return, thinking they'd sort it out. Nope. They took a look and flat-out refused, but didn't bother explaining why. Honestly, this is the last straw. Both Boyner and Nike are off my shopping list. Their customer service is just plain lousy.