Subway complaint: Gave me the wrong order placed on the app

I have been dieting, so I have been ordering turkey 12 inch subs and spend $103.00 dollars a month through Apple Pay, which I have proof. On one day I came in to pickup my usual order and I came in earlier than the time it said it would be ready. Someone before me ordered about the same as mine but with 12 inch and a 6 inch. She gave me that order and I told her I ordered 2 12 inch subs. She said well this is what the order came through as so something went wrong on the computer. I took it as a loss. Within the next time I came in she new me cause I order a lot, she says to me that the order I got was not mine and her district manager said my order didn’t go through and so I had to pay for that order. I said you guys made the mistake and asked for the to call her. She would not give it to me. So not they are going to loose my 103.00 a month business because I will not be going back to that subway. I will make my own subs or I will get them from Big Belly subs.