Broken Plum shoe

My main issue is when a store fails to recognize a genuine customer. I purchased a pair of plum open boots a few weeks ago, but soon after wearing them, I noticed the plastic had cracked. I visited the store multiple times, showing them the damaged boots, but they continued to send me away, promising they'd call, yet no follow-up has been made. I bought these boots last October, and even laid them by before purchasing. I returned within six months, explained that I am a loyal customer who loves the plum brand, but still received no assistance. All I wanted was a replacement for my defective boots."