False advertising

Today 29 01 18 I was at Checkers Klipfontein Witbank. I bought 3x Sunlight Tropical, as per advertising on package buy 3x and R8 airtime guaranteed. The lady at the till tried to assist me and said I must open the package of the 3x sunlight I bought inside there will be a number and I must follow instructions to receive my airtime.. It doesn't work at all I tried all 3x package.. It's false advertising just to get a sale on sunlight products! Shame on Sunlight!!