I get:
Warning
The coupon cannot be applied because some of its conditions are not satisfied (for example; your order does not meet minimum spend, you are not an email subscriber, or you have already used the code), or the discount coupon is no longer active.
Please ensure you've used the correct discount coupon and try again. If you are on old versions of Internet Explorer we recommend you try a different browser.
and do you meet all those requirements?
Offer valid for 30 days from date of signup.
*Voucher can only be redeemed online. Limit 1 per customer. Minimum order value $25 excluding delivery.