I just had an order from Coles delivered where I used a promo that gave 50% off ($30 cap) on your grocery order. However, some of my items were not in stock at Coles so they had to remove it from my order which resulted in my promo code also being removed and me also being charged more.
I was initially charged $49.65 but ended up paying $59.93 even though my items is 3 items shorter now.
I've contacted support but they need a screenshot of the promo which I no longer have. So if anyone can check their app and see if they have that promo I'd appreciate a screenshot of it lol.
It sounds like a targeted offer, check your email, they usually send the offer there.