colour fades

it is almost a month since I bought an Apple Watch Series 7 GPS, 45mm Starlight Aluminum Case with Golden Brown Leather Link. In the first week, I realized that in some spots the color of the strap is fading. now, as you can see in the following image they are getting black color and dark. I thought that I bought a high-quality product, but it is like I just wasted my money. a fake leather strap with a guarantee would cost me around 30 NZD and I paid 160 NZD for his band!! please let me know how can I complain about this?