fasle adverti*****t and a load of lies from the headoffice to the store

worst experience ever from the stores to the headoffice FASLE adverti*****t it says open and credit card account and you will get 500 cash back I did it but still haven't receive anything at already 2 Thursday's have passed as the head office said that last week Thursday I would receive it but nothing the store said download the app and once you link your card you will get it still nothing how do they advertise 1 thing and do the opposite.