My Grundig 65-inch TV is Unwatchable Due to the Flickering 'Sehim' Night Lights

I purchased a Grundig 65-inch TV on August 28th, and I'm experiencing flickering 'sehim' night lights along the frame in a dark environment. During the day, everything seems fine. I'm wondering if I should request a replacement for my television because the local service hasn't been able to resolve the issue. While the customer support has been responsive and helpful, the local service providers are, in my opinion, tarnishing the brand's reputation. This problem is not just about the television itself but also the service quality and customer experience. I hope for a swift solution that brings back the enjoyment of watching my TV without these distracting flickering lights.