Hoover Clothes Dryer Sent As Display Unit Instead Of New Sealed Product

I purchased a Hoover brand clothes dryer, and after the product was delivered to my home, we called the authorized technical service for installation. The technician clearly stated that the product was a display item and did not resemble the packaging of a brand-new, sealed product, so we refused the installation. When I went to the branch where I bought the product, they told me they had made a stock error, that they had no remaining units, and that this was why they sent a display item without informing me. They also said they could issue a refund if I wished, but if new stock arrived, they would sell it to me at the current price, not at the price I originally paid. I did not purchase a display product, I was not informed about this, and I do not accept being forced to bear the cost of their stock error by sending a display item without my approval. I request that the Hoover clothes dryer I purchased be provided to me as a brand-new, sealed product at the price I paid. I want this issue resolved urgently so that their stock and pricing errors do not result in customer victimization.