Did you get a promo code and it didn't work? Promo codes need to be exact. No spaces after the promo code and it is case sensitive. In addition, should you try to use a promo code and then stop the transaction halfway through, the promo code may not go through again because it was a one-time use code.
In addition, many codes often have expiration dates. If you feel that you have done all of these things and the code still doesn't work, feel free to message us and we will check into it for you.