I don't usually do this; in fact, I try to be as peaceful and understanding as possible. I know there are times when people have a bad day, but that's no reason to make others have a terrible time. Jimmy John's at 4500 Park Rd # 101, Charlotte, NC 28209, has a severe problem with their service. Their employees don't take orders correctly, or they end up serving you something you didn't order.
Last Saturday, I went with my daughter to Jimmy John's on Park Road; she was hungry, and we stopped to eat something, but the attention was not what we expected. They did not take my order, they made us wait more than 20 minutes, and when they finally served us, they only gave us a single sandwich, which I gave to my daughter.
I hope not every Jimmy John's branch has these customer service issues, but if you can avoid going to the Park Road branch, please do so.