Apparently yours had free shipping because you bought with another product in the cart. Was told no free shipping as included in the T&C for St Henri which we all had 2 seconds to read when purchasing.Do it via the live chat. You are entitled to free shipping as per the advertised promo. Ive had same issue previously thats been quickly rectified by live chat.
My St Henri had attached free shipping FYI.
https://www.vinomofo.com/penfolds-st-henri-shiraz-2018-1pk-birthday-deal-terms-and-conditions-2024