Subway complaint: Sandwich was not ready when I arrived and I was 20 minutes after it was supposed to be

Sandwich was not ready when I arrived and I was 20 minutes after it was supposed to be. This is the second time in a row that that’s happened last time turned into a real fiasco. I tried calling them to cancel the order three times no one answered the phone again. The app didn’t offer the buy one get one at 50% off on the foot line and I didn’t realize it until I had already placed the order that’s the reason I wanted to cancel. When I got there my sandwich still wasn’t ready and like I said it was 20 minutes after it was supposed to be ready and all he did was apologize. I asked why they didn’t answer the phone and he looked at me and said I’m sorry I don’t know how. At The end of my visit I asked for a receipt so I could complain about it and he said I I’m sorry I don’t know how. This is the same young man that was there the last time when my sandwiches also weren’t ready when they were supposed to be. I will not Be going back to that one again. There is another subway in our town and I will be trying that one if that one isn’t any better I won’t be ordering subway anymore