Tama Starcl. Walnut/Birch 5pcs -SPF

I have this kit less than a year, in my living area with perfect insulation from outside and protection of klima. I was cleaning them 1-2 times per week. The thing is that the nikel of kit ( the rims and everything that is nikel) is like is old and very damaged for some reason. I was very careful with kit, i dont know why this happened really, my car is 23 years old and nikel is like new. I texted the service team of Thomann and they told me that warranty doesn't covers me and if i want i can be charged for a repair. That's really laim, i paid so much for destroyed nikel or very cheap matterial. Overol, i am happy with the wood parts.