It's often a really, really bad idea to post a phone number or real email address in any kind of online forum etc. This is why the PM service here is so useful - you can get a private message without having to give out personal info.
HKD2,400 for a wake-up service is clearly a scam - c'mon - even if it WAS a valid phone service, do you think it would cost about 6 times the entire monthly phone bills of a full plan with bells and whistles (or about 20 - 30x the cost of a cheapo plan)? 24HKD a month would be more like it, for a real service. Its a scam.