If you are finding you are having issues with a discount code, we recommend you start with the following steps:
1) Start fresh - clear your browser cache, cart (or try browsing in incognito mode) etc. and start again from the beginning to help weed out any unintended errors.
2) Add your order to the cart once again, including any discounted/promo item(s).
3) Once you cart is complete, THEN apply the intended discount code and it should function as intended. Please note that you cannot use multiple discounts/codes simultaneously, and that some codes do expire after a certain amount of time.
If you still encounter an error, please feel free to reach out to us and we can look into it for you.