Pandora Bracelet Tarnishing - Urgent Solution Needed

My Pandora bracelet has lost its shine. The color has become yellow. Why did this happen when I hardly even wore it? It's really disappointing when a product of this price range loses its shine. I kindly request a replacement as soon as possible; otherwise, I may need to express my dissatisfaction through various channels. I need a solution right away. It is imperative that an authorized representative provides a response, as I am fully committed to asserting my rights.