Subway complaint: Rude employee

Your store did not have what I wanted so I called my wife to see what she wanted instead. The young man serving me asked me what my next sandwich would be. I told him I was trying to find out and told him what vegetables I wanted on the one I already had. I tried to tell him again that I was trying to find out about the other. He talked over me and then told me that I was being disrespectful. After I ordered my My second sandwich and paid ( I actually think I was overcharged) I wanted to calmly talk about the conversation we had earlier. He refused to listen walked into the back room telling me that I was being disrespectful. I asked for his name. He repeatedly refused to give me a name. He asked for my name. I freely gave it. Somewhere in the midst of all this he told me several times that he was going to refuse to serve me if I came back. My receipt says that I was served by: 1949. He was extremely rude.