False advertising at Clicks

I ordered a 3 piece DKNY perfume set on the Clicks website, on Sunday 1 November. The payment was successful and stock available according to the site. Today 03 November I received my order, only to realise that it included completely incorrect items. When chatting to the online consultant about the return of the incorrect items for the correct items, I was told that they will investigate what went wrong, as the items are possibly not in stock and I will need to either receive a refund or a clicks cashback on my clicks card. I cannot understand how a Brand as large and well known as Clicks can falsely advertise goods that are not in stock and not state that on their website. It makes no sense how an online sale is allowed and processed when the goods are not available. I am utterly appalled at the service by Clicks Online, and the false advertising. It's utterly frustrating that I did not receive the correct goods that I paid for from Clicks, and am told there is no stock. What happened to Clicks honoring their sales policies on products.