Siemens Sent Me a Defective Three-piece White Goods Set and Won't Replace It

The three-piece white goods set I bought from Siemens, thinking it was a reputable brand, turned out to be problematic. They said the strong smell from the dishwasher would fade over time, and a service request was created for the washing machine. The situation will become clear once the service arrives. I've been dealing with the refrigerator for 16 days. The upper door was defective, there were cracks and black scratches on the interior body paint. Upon delivery, the upper door gasket was moldy, worn, and sooty. When I informed the store where I purchased the product, they said, "The issue is not with us, the boxes have been opened, and we can't take it back. The service will come for installation, have them document it, and they'll take the necessary actions." If the product won't be returned once the box is opened, why open it in the first place? In that case, the technical service should open it. Why should the customer and workers be put in a stressful situation and be made to suffer? I informed the technical service about the situation and requested a report to be made. I bought a brand-new product, yet despite requesting a replacement for the defective product, no exchange has been made. I'm still dealing with this issue. In a recent call, they told me the product is under review, and the result will be clear in a few days. I have been mistreated, and I expect Siemens to stand behind its products.