Thanks thephantom for the tips. I finally got my postal ID. I applied at SM Aura. I arrived around 12:30 pm and they asked me to back 1 pm after I made the payment. They only accept rush lang pala at Aura. It took me 2.5 hrs. I should have esten lunch muna at one of the restos on the 5th floor lol.
I'm happy with my new ID. It's so different from the old paper postal ID