Truworths

I went to the shop and found an item on the shelves that was on sale, when I when to pay for it at the tills I was told that it will only be on sale the next day. I logged my complaint at the head office, I had to follow up (friday) with the on the progress and was told by an agent that my complaint has been resolved and that I will be informed on monday. How do they resolve my complaint without engaging with me?