Lenovo Yoga Slim 6 Shutdown Burned Motherboard And Replacement Request

While using only Microsoft programs on my Lenovo Yoga Slim 6, the device suddenly shut down during a system update and never turned back on. When I contacted the authorized service center, I was told that the motherboard had burned out. Since the device is still under warranty and the issue is not due to user error, I requested a replacement device and clearly stated that I also wanted a refund option to be considered. Despite this, without providing me any information or notifying me that my refund or replacement request had been rejected, they replaced the motherboard entirely on their own initiative. My service record number is 2028140213. The communication throughout the process has been severely inadequate, with no transparency at any stage. When the issue first occurred, a technician was sent to my home, and the personnel I spoke with told me that I had the right to request a replacement or refund, which is why I submitted that request. However, the process has now exceeded one month and has caused significant loss of time. This entire situation has also negatively affected my education, as I am currently in the middle of writing my thesis, which further increases my hardship. Additionally, it is unacceptable for them to place the burden of their own software failure on the user and carry out repairs without any communication. Since I requested a device replacement, I did not accept the repaired device. As the device is under warranty and the issue is not caused by user error, I request that my laptop be replaced with a brand-new device to properly resolve this situation.