Spin and Win competition not sending emails

I purchased diesel at engen in centurion and i entered a competetion on the speedpoint, i was also given a pamphlet to scan and attatch my slip with where i was taken to a spin and win page, it showed that i wont R1000 voucher and that i will get an email shortly with the details. This happened yesterday around 13:30 and until now i havent received an email. I have checked the SPAM folder, refreshed and refreshed. Is this real or was this a ****? i got this pamphlet with QR code from service consultant at Jean Avenue