Wimpy false advertising

Dont understand how wimpy in Heidelberg mall can advertise by bathrooms and also on the wimpy up a special of burger chips and milkshake @R64. 90 but when u ask them they say its a old menu why is there a old menu on app and why are the false advertising at bathroom with poster how can u advertise something that ur not selling and on the poster it doesn't say out of stock or on the website