Use Google Play Credit To Buy Device -

: You cannot transfer or convert Google Play credit into Google Store credit, nor can you move it to another Google account or cash it out to a bank.

: Balance is tied to the specific country where it was purchased and cannot be used in other regions. What You Can Buy Instead use google play credit to buy device

: Physical goods from the Google Store (gStore) are considered "ineligible items" for payment via Google Play gift cards or balance. : You cannot transfer or convert Google Play