GoPro Approved My Swollen Battery Warranty Claim but Trendyol Seller Disappeared

I purchased a GoPro 12 from the seller named Es Tekno Market via Trendyol on September 12, 2024. While the product was still under warranty, about 10 days ago I noticed that the battery I used the least had swollen. When I contacted GoPro headquarters, they agreed with my case and stated that the issue should be replaced under warranty, noting that this process must be handled through the seller.

Even though I hold written proof from GoPro headquarters confirming my claim, the seller cannot be reached via Trendyol. Trendyol customer support stated they would contact the seller to provide authorized service details; however, following my request, they stated they could not reach the seller and asked me to contact them myself. I am also unable to reach the seller, leaving both Trendyol and myself without a solution.

I am a content creator and rely on this camera for my work; I cannot shoot videos due to this battery failure, causing me significant hardship. Since GoPro headquarters has acknowledged that the issue is covered under warranty, I do not want to be victimized due to an uncontactable seller on Trendyol, which is an issue beyond my control. I demand that the swollen battery be replaced free of charge under warranty, or that Trendyol provide me with a replacement battery due to their inability to contact the seller, resolving this matter urgently.