Witholding Information

I purchased a lounge suite and TV unit on Saturday. Spent a total of R12 300 cash. Very happy with items but early Monday morning received a sms informing me of the discounts on offer of 20% for spends over R4999. WOW that would have been a saving of R2460 had they actually told me to wait 1 day with my purchase. Store now maintains they only found out the Monday morning (26/3) that the sale starts that day. *******. Who only informs their stores that the sale starts when they open.