You have the right to withdraw from the purchase contract, without any penalty and without specifying the reason, within 14 days of receiving the goods (pursuant to Article 52 of the Consumer Code).
To exercise your right of withdrawal, go to the link 

What happens after confirmation

• You will immediately receive a confirmation email with the date and time of your declaration of withdrawal
• You must return the product within 14 days of this declaration
• You will receive a full refund within 14 days of receiving the returned product, to the same payment method used for the purchase