If you buy goods in a shop, you have no EU legal right to return the goods (for exchange or refund) unless the item is faulty. However, many shops voluntarily allow customers to return or exchange goods during a certain time period, provided you have the receipt. Check your receipt or the returns policy of the shop where you made your purchase for more information.
https://europa.eu/youreurope/citizens/consumers/shopping/guarantees-returns/index_en.htm

Это же не под офлайн, да?