Sub standard product

I purchased a wooden door from Patel Hardware Malelane.The product was wrapped in protective plastic and I accepted that the product would be of good quality. The product was duly delivered and I instructed my carpenter to instal it. Once the door (which cost close to R1000) was installed and varnished I noticed that the entire door was constructed of wooden off cuts and of a very poor quality. I phoned Shameer of Patel Hardware and complained and was told to bring it to them for exchange. I drove thirty kilometers to Malelane and upon arrival at the store I was told that because holes were drilled in the door it could not be exchanged.I have suffered a financial loss as a result. Their attitude was simply" tough luck". Why could they not have supplied me with an acceptable replacement and returned the door to their supplier? I have spent in excess of R200k at this hardware shop in the last five months and will never shop there again.