What are the terms and conditions of your promotions? 02 November 2022 04:47 Updated Please see our Terms of Sale (Clause 12) for any information on ghdhair.com promotions. Related articles I am seeing a message that says my code is invalid, what does this mean? Can I use my promotional code with another offer? Can I change or cancel my order? Do you offer student discount? Do you advise in advance of your promotions?