The post office to send parcels to oversea or within Thailand moved to level 6. You have to use the glass elevator on level 4, near to check in line Q. On level 6 is also the observation desk. Left luggage on level 4 behind the glass elevator at check in line Q or on level 2 next to the police station. Massage on level 3 on the right hand side or if you passed the passport control already in the departure area A for national flights or E for international flights.