Just check from the hotel, they have the complimentary city express (free of charge).
from hotel to city
2:00 pm, 5:00 pm, 8:45pm
from city to hotel
From Wisma Merdeka:
9:50 am, 12:55 pm, 4:20pm, 7:10pm
From Centre Point:
10:05 am, 1:10 pm, 4:35 pm, 7:25 pm