Please check the billing and delivery address. In particular, you should provide the billing address correctly. If you would like to make changes to the address material, please contact us immediately after purchase. Unfortunately, we are not allowed to change the billing address after the invoice has been sent. You will receive the invoice as a PDF by email on the day of dispatch. Unfortunately, we can no longer generate a paper invoice. 3. The guarantee applies to manufacturing and material defects in the delivered goods. The guarantee does not cover any consequential damages. Warranty claims cannot be considered in the case of damage caused by improper handling, modifications to the goods made by the customer, failure to follow operating or care instructions, force majeure or environm.