Please make sure that you entered it in the same format as you received it from us (i.e. in capital letters and with no spaces) and confirmed it by clicking on the button “Redeem”. Also, please check if your coupon can be used for products you ordered (a lot of our coupons cannot be applied to the discounted goods) and if it can be combined with other coupons and special offers or not. Some coupons can be used only for a specific minimum value of order, so, please, check whether the value of your order meets the coupon criteria. For further help, please, contact our customer service at hello@dedoles.co.uk.