How do I apply a promo code? freyja Customer Care Admin Account October 18, 2018 06:44 Updated Follow If you have a promo code, simply key-in the code at the “Apply a promo code” box at checkout and click “Apply”. Related articles How many promo codes can I use with my order? How do I pay with store credits? Can I cancel my order? How do I apply a gift voucher? How can I get samples?