We can only process a complaint with a valid proof of purchase. For this purpose, please keep your serial number on hand when contacting our customer service. You can either find it on your clasp or your authenticity certificat. Of course, you can also always find your details in your account. Please contact our customer service with a photo of the defect and a short description of the problem. Afterwards we will check your complaint and in the next step we will repair the product in our workshop. If a repair is not possible, we will exchange the item completely.