Coupon codes may only be valid on certain products. They will not be valid on newly launched products in the last 90 days, products which are already discounted as part of a sale or promotion, this includes discounted sets, bundles and some site promotions. The codes are also not applicable on KAYALI purchases. This may be the reason why your discount is not being applied. If your cart has KAYALI products, the code will only apply on eligible items.
If you're trying to use a coupon code exchanged from Huda's VIP Rewards, these should be applicable even on sale items but cannot be applied on KAYALI.
If you've used a Huda's VIP Rewards code that cannot be redeemed, please check if the code has been entered correctly then send us a screenshot of the error you have received and details of your code so we can check this for you.
We are unable to process refunds for promo codes that have not been successfully redeemed on an order at checkout, however, you can always use your code on your next order (as long as these are still within the validity period).