There is a proper address
Merpati does have a proper HR dept and most new joiners have simply shown up to the office in Jakarta and handed in a Resume. You could wait a week or 6 months but they have been recruiting walk in's for a while now. No 24k up front either.
Emailing HR will not get you a response anyway. Your best solution is to email the guy and ask if he has filled his quota yet. You must remember that the $200 is just to hand in an application. It doesn't guarantee you and interview. He could take money off 500 people to get his 60 apps.
Also with Merpati you don't get paid until checked to line and that can take months.