Defective Bosch Fridge from Marmara Forum Bauhaus

A Bosch refrigerator at the Marmara Forum Bauhaus made an impression on me. The staff informed us that the product was not currently for sale and that delivery could take up to a week. They suggested we take the display model right away and assured us that the warranty would not begin until we received the new one in the mail. Despite the fact that it was a display, there was no discount. After inspecting the cabinetry, we decided to accept the refrigerator's delivery. Nonetheless, we failed to inspect the top, and as a result, we discovered holes in it later. Unfortunately, my mother had already given her approval, assuming no damage to the property. What options are available to us in this regard?