KFC misleading birthday promotion

I just ordered a KFC 9 piece bucket after reading about the 50/50 birthday promotion, needless to say all I got was a miserly 25% reduction, the bucket is marked R112 but ends up costing R139. With a side-order of medium chips, (not many chips), our order came to R168. Less another deliver promo and it cost R158, a far cry from the 50/50 deal offered via the press