Hyundai Leaves My Staria Hybrid Without Rear Window for Months

My Hyundai Staria Hybrid vehicle was delivered to the Antalya Cangarlar Authorized Service on September 2nd due to damage that occurred while parked. As part of the repair, the paintwork and headlight were fixed; however, the left rear window could not be replaced as the part was not in stock. I was told that I would have to wait approximately 3 months but no clear delivery date for the glass was provided. On September 18th, I was forced to take the vehicle back without the window, as my 15-day courtesy vehicle entitlement had expired, and I urgently needed my car. As a temporary solution, not even a proper cover was installed — I received the vehicle with a torn and half-taped paper bag instead of proper protection. My car is still under warranty, and all repair processes are being handled through insurance (Claim File No: 15797249240002). I have contacted both the service center and Hyundai customer support. However, no satisfactory solution was offered apart from being told that the replacement glass would take months and that no courtesy vehicle would be provided in the meantime. The fact that even a frequently required spare part such as a window is unavailable at an authorized service center has severely damaged my trust and perception of the Hyundai brand. I was once proud of my car, but now I am left deeply disappointed. As a temporary solution, I am requesting the provision of a courtesy vehicle. I also believe potential Hyundai buyers should be aware of these ongoing spare part supply issues. Due to this experience, I am now considering selling my vehicle and not choosing Hyundai again in the future.