I have emailed the play store support to ask about why they have been cancelling my orders.
I got a reply and specially highlighted in bold that if you do not live in a country from which Devices may be purchased, Google reserve the right to reject the order.
When i setup the new google account, i was connected to VPN, and the country i selected was Japan.
Mobile number i have no choice but to enter my SG number.
Each order is shipped to Tenso.
My two possible guess that how they deem that I am not living in Japan is through my mobile number? Or is that Tenso address is really black listed, hence rejecting my orders.
Anyone uses sg mobile number during google account setup and successully got your phone shipped?