This is the most hotel rooms in the world. But als...

This is the most hotel rooms in the world. But also most lousy reception in the world.
Book 1 room 2 night 15-17 dec 19, 3 months ago. Found that the room is small ,no enough for my family with small kid. So decide book another room 1 night only on 15 dec 19 and stay on 16 dec 19.
Inform the reception counter on 15 dec 19 6pm tmr 16 dec 19 the room i booked can reserve for me on same level and close to my first room, will come to collect the room key on 16 dec 6pm. They said cannot, ask me tmr check in and try my luck. End up my luck don't have, only manage get the room on different floor..:(
So, i stay with my family on different level. Suck hotel receptionist in the world.