False advertising

On 27/07/2019 I went on to www.middestad.co.za and they were advertising 50% discount sale. After traveling there on the same day and choosing the items I wanted to purchase, I was informed by the staff and supervisor that they do not have a sale. Fortunately I went to Metro account the corner and found the same items cheaper. I just want to report them for false advertising and make people aware of this ****.