Useless waiter and branch

Last night while waiting for family to leave, we stopped at Wimpy in domestic airport. Once seated by Tumi, we had to literally WAVE like lunatics to actually get him back to serve us. Two of use are allergic to dairy so I asked about Dairy alternative which it says is available on the menu. Tumi looked at me like I was speaking a different language, blank stare. When we ordered bar one milkshake, out of stock. He bought all the drinks except mine. When we wanted the bill we had to wave around and the THREE staff sitting at the counter ignoring us and chatting. This is by far the worst branch of wimpy. TRAIN your staff. They are like lazy zombies doing us a favour. Don't put things on the menu u don't have in stock, or use your brain and tell the table before ordering