Checkers Special?

I was at Checkers in Mooirivier Mall today and they had a special that if jou but 2 Dr. Oetker pizza's you get a 1,5 liter coca cola zero free. When we wanted the special we couldn't find any coca cola 1,5 liters any where then we spoke to Jack Lepadi who said he wil go check. He never came back to us. I am very disappointed about there poor service.