LG Sirius 18000btu Air Conditioner Setup Incomplete, Customer Service Abysmal

I bought LG Sirius 18000btu air conditioner. Service setup is incomplete. They did not perform the "vacuuming" process written in the user manual. She said we did something called "sweeping" instead. As it is written in the user manual, vacuuming is essential for the performance and life of the device. I called the service and they came. They went back without measuring anything. I called LG. They said we will call you, but there is no caller or asking. Supposedly we bought a quality brand quality air conditioner. We paid twice as much as normal air conditioners. I won't even go near LG store from now on. They did not take responsibility by doing incomplete work to show their eyes.