It seems like this deal works at all stores in CHCH just use the store prefix and append the code you want to use.
Prexfix examples: Hornby = HNB, Wigram = WGM, Rangiora = RNG
25UNHOLY = Free Unholy Donut
30D = Free Delivery
30NUG = Free Chicken Tenders or Nuggets
Offer expires 31/01/2020