If your app store shows a different currency than the currency of the country you reside in you can manually amend this through the settings page.
From the Store screen, open the main menu and tap “Settings”
Scroll down towards the bottom and click on “Country” and select the country you reside in.
You may also need to clear the shop cache for the change to take affect. To do this click on "Clear shop cache" in the settings menu. Confirm you wish to do this by tapping “Clear”
Exit the app and return back to the app home screen.
The app should now show the currency and content matching the country you reside in.
If it has not changed to the correct currency it may be an issue with the location settings on your device.