Singapore Airlines has a city office at Suite 12A-01, Level 12A, 8, Jln Binjai, Kuala Lumpur, 50450, but this location primarily handles corporate/HighFlyer/PR, while their airport office at KLIA Main Terminal, Level 4 handles check-in/baggage, and you should use their Contact Centre (+1-866-829-1086) or website for bookings/KrisFlyer help, as the city office isn't for ticketing. Jauntlet.comhttps://jauntlet.com/