Important! Please read!
Check your goods for damage immediately upon receipt. Complaints can only be dealt with quickly and easily if they are made promptly. If damage to the product is reported as soon as possible, we can have the goods replaced by the manufacturer much more flexibly and easily.
If you wait more than 10 working days to make a complaint, it becomes much more difficult for us to obtain a replacement.
https://koi-company.com/General-FAQ/Shipping/Important-Please-read