Mc Donalds being 2 faced...

I drove from the airport (place of work), trying to get to the mc donalds isando, so I showed my cashier that I would love a upside according to my app that I downloaded when I was within my time frame of 5mins, and she told me that this doesn't work, and it seems redundant to have ur promotional apps, then mc Donaldson goes around and say there's nothing they'll help me with... So please get back to me with resolution as it would be kindly appreciated unlike Charlene who wasn't helpful... **********