2) Add a new card or change your default payment instrument to one with a billing address located inside your desired country
3) Open the Play Store and navigate to any item available for download
4) Click to begin a download until you reach the "Accept and buy" screen (no need to complete the purchase)
5) Close the Play Store and clear data for the Google Play Store application (Settings > Apps > Google Play Store > Clear Data) or clear your browser cache
6) Re-open the Play Store. You should now see the Play Store that matches your default payment instrument's billing country.
If you haven't yet added a payment method to your account for the first time, please add a card directly from the Play Store with a billing address that matches your intended country location. Then, follow steps 3 through 6 to show your intended country's Play Store.