Have experienced an ID in Singapore also not picking up calls, work halfway done but we have paid  100%. He owed contractor  and suppliers money until they knocked on our doors to ask for payment.  As long as your contractor phone not terminated you still have chance. Keep on calling or sms, you must be nasty and make sure he come to see you. Then you can settle with him face to face. This issue will prolonged so be prepare that work will standstill for many months. 

This is the ID guy's face you can find in the link below. I heard he has venture into Indonesia , in case he decide to come here , for the benefit of Malaysian please take note:

http://kingrosedesignpartnership.blogspot.com/