Not happy with the serv8ce

I ordered a sandwich at the drive thru. When I got to work opened the sandwich I wasn't happy with the sandwich. I took it back to them told them I wasn't happy. The cashier who took it took it to the back and came back with the manager who told me of how their sandwiches were made with a very bad attitude and told me I would get my money back. I explained I didn't want any money or another sandwich I wanted a smoothie maybe because I didn't trust the result would change. She didn't even apologise for my dissatisfaction and she just told me I had an attitude. All of her staff came to the front to stand there and stare at me instead of apologising. I felt embarrassed and very disappointed and I mean I spent my money there and didn't expect such drama. What ever happened to the good old rule of making customers happy