FALSE ADVERTISING FOR TURNOVER

Pick n Pay Maponya and false advertising, Pick n pay had a special if you collect 40 stamps at R1.00 per stamp you get a casserole dish and the special ended on the 04th of august 2019 but i haven't received my casserole dish and whenever i go to pick n pay I'm told that they will call when they received stock. And lately was told the special is over but we never had what was promised. was that special a way of increasing their turnover. I catch a a taxi to maponya n i went there 15 times already. who will refund and should i do with their stamps. FALSE ADVERTISING IS WRONG IS LIKE I WAS DE*****ED BY PICK N PAY