Should you have any questions or concerns, we are always happy to assist you. Please contact us in writing (by letter or email). To ensure we can help you quickly and effectively, please provide your BaWoCe order number and the item number of the affected product. A detailed description of the problem, along with photos or videos, will help our specialists diagnose the issue. Please also include your complete contact information, the source of purchase, and the contact details of your installation company.