False Advertising

On 02/08/2024 I poured Petrol at Sasol Ruimsig. I then saw a Redbull compettion that there were running that if you spend R750 or more and buy a Redbull product you may enter the competition. I spent R1078 on petrol and bought 2 Redbull cans. I used the number that was supp**** ***to enter the competition and I kept on getting an error message of the message not being delivered. I phoned the customer care centre twice and I'm still not sorted. I need someone to look into this as I'm now taking this as false advertising.