ADVERTISING PRODUCTS YOU CANNOT COMMIT TOO

I am so upset with MTN in Kempton Park, the one in the Checker center, I got my S20 the first day it launched, and was subsequently supposed to get a R500 Takealot voucher but up until today no word from them. And every time I go to checkers, I pop in and ask and between the guy who helped me and the store owner I received no joy. YOU CANNOT ADVERTISE SOMETHING YOU CANNOT COMMIT TO.