The Free/Complimentary item is available in your Cart Page, click the "Bag icon" in the top right hand corner.
Once on the Cart Page you need 1 or more items added to your Cart to be given the option to select a Free Item. (Up to 2 FREE Gifts per order)
If the option is not available you will need to add at least 1 item to your cart for the free product options to appear, add 1 or more items to be able to add your free gifts!
Once you have added an item to your Cart you will then be able to add a free/complimentary item to your Cart.