Price sudden change

Good day,early this morning I saw a post in facebook group where one of the mothers told us that Game store has a sale on Baby wipes for R129.I checked online indeed they have a sale on wipes.I then contacted a friend to buy for me at mall of Africa since where I reside they out of stock.to my surprise she tells me that the wipes are R220 not R129.I even send her the screenshot n the sale ends on the 26 of July.samething that was advertised for 129 is back to 220 for no apparent reason.I still want those wipes for the price I saw online this morning which is 129 not R220.