How can I cancel my order?
If you wish to cancel your order, please contact our customer service as soon as possible. We will do everything we can to fulfill your cancellation request. Please note, however, that we can only process a cancellation if your order has not yet been shipped. You can reach us by email at sikushop@siku.de or by phone on 02351/876-0 from Mon - Thu 08:00 to 15:30 (Fri until 13:00)
https://www.siku.de/en/Frequently-asked-questions/Onlineshop/How-can-I-cancel-my-order