Google Pay now available in Cambodia?

Has anyone successfully added a MasterCard from Prince Bank or Canadia Bank to Google Wallet?

I just found out on the Google support page that MasterCard from these two banks in Cambodia now supports NFC contactless payment in Google Wallet. I'm so excited as I've been waiting for this—I prefer using card added to digital wallet instead of physical card, since it's more convenient and secure than carrying cards around.

I went to Prince Bank last week to open an account and get a MasterCard to use with Google Wallet. Unfortunately, I'm still unable to add cards to my wallet.