Terrible marketing devision

Went into Checkers bottle store 1st may and saw an ad to win a castle lite fridge if you buy a case of castle lite.i bought a few and asked the cashier how to enter.no one not even the manager knew what to do.they said scan the barcode which I tried with no joy.i called the SAB customer care for them to tell me there is no competition running and they will take it up with marketing.i went to the same shop 7th may to see the ad is still on the window.castle lite marketing department should seriously get their act together and as a big castle lite user maybe will also look at other brands.very disappointed with being misled by SAB.