Just had lunch with my brother at an All Bar One in the city and out of two orders the waitress got two things wrong.
Firstly not getting one of the drinks. When asking her where the drink was she said she didn't understand what Steve said. Why don't you explain that you didn't understand at the time? How hard is ordering a coke.
I ordered a lamb burger and ended up with a beef burger. I didn't particularly mind so ate it anyway without complaining but come one. You may be working in a bar in order to improve your English but the bar should require a minimum level.
Strike one. They will be added to my boycott spreadsheet.