Hi, just sharing... i tried calling Genting Malaysia previously to attempt to book for rooms. After multiple of calls (and costly bill) , they finally picked up. They said that the website reflects exactly on what they have. So if you see that the room is unavailable on the date, even if you get thru, they will tell you the same. So dont bother.
but if you still want to give it a try, you may try to call in after 9pm. My call finally got thru at 9ish , and waited for 30mins. Day time, dont even think. They picked up EVERY CALL and divert you to a voicemail. And your telcom will charge you. I was charged by M1 for $0.70 per voicemail. And i called them like 15times.
hope it helps any of you