IKEA Did Not Deliver One of the Billy Bookcases I Ordered

I bought 26 products from the IKEA online store, and my order dated 01.07.2025 was delivered by Arvato. As you might expect with so many separate pieces, we only noticed over the weekend—while assembling everything—that one of the items was missing. According to the attached invoice, I ordered 6 Billy bookcases with glass doors, but only 5 bookcases were delivered, even though all 6 glass doors arrived. That left us with 2 unused glass doors. I immediately filled out the customer service form and submitted my request. However, the reply I received via email stated: “...Regarding your missing product report, camera footage was reviewed. The products in the order were packaged in their original boxes after scanning the product code 30263844*6. The order contains 18 packages, and packaging was complete. Camera footage and inventory count confirmed no missing or extra items, and warehouse stock was accurate. The courier confirmed that the full order was delivered...” Despite submitting additional objections, I received the exact same copy-paste reply each time. The customer service team I contacted provided no resolution. In short, I still have not received the 1 Billy bookcase I paid for. I’ve been waiting for a solution for nearly a month, but IKEA keeps responding with the same canned message. What kind of corporate behavior is this—blaming the paying customer for a mistake that clearly lies with either IKEA or the courier? Are they seriously accusing me of lying about a single bookcase? That’s absurd. Now I’m just left with unused doors—if you'd like, we can donate them to you. If you truly consider yourselves a corporate company, I ask you to investigate this situation properly, recognize that the error is not on my part, and contact me as soon as possible to deliver the missing Billy bookcase to the same address.