Please log into your account before applying any promo code and key in your promo code at the shopping cart page. As we are currently in the progress of migrating to a new interface, you may see either of the following:1. New Interface
If you are seeing this, you are on the new interface.
At the cart page, click 'Add". You will be able to key in your promo code in the pop-up.
2. Current interface
If you are seeing this, you are on the current interface.
At the cart page, enter your promo code in the field before clicking apply.
You may wish to check that your promo code is reflected before checking out.