Please check the billing and delivery address. In particular, you should enter the billing address correctly. If you would like to make changes to the address material, please contact us immediately after purchase. Unfortunately, we are no longer 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 relates to manufacturing and material defects in the delivered goods. The guarantee does not cover any consequential damage caused by defects. Warranty claims cannot be taken into account in the event of damage caused by improper handling, self-made changes to the goods, non-observance of operating or care instructions, force majeur.