Moving with the times and technology

I was very disappointed yesterday when I went to buy a few things at Woolworths Richards Bay Boardwalk. I realized I had left my card in the car but saw a manager on the floor and enquired about possible options that I have to make a payment showed him my store card App that has my signed store card and I also advised that I have my ID with me. The lady at the till called her superior who refused to let me pay and said if I had a Woolworths App it would be okay but they do not know my App and will not be able to assist me. My question to Woolworths is why would you allow your cards to be uploaded to different Apps if would not allow us to use them at the store?