Can I add a promotional code after order completion? 15 May 2019 09:44 Unfortunately, once your order has been submitted we are unable to add this retrospectively. Please note that we cannot cancel any orders after they have been placed. Related articles Can I amend or cancel my order? How do I return an item for Exchange or a Refund? Why can't I add multiple promo codes to my basket? I have received the wrong item How much does delivery cost?