[nana premium] Problems

I registered for nana premium, but the premium features are not working.

【iOS】
If a message saying your session has expired appears, please press the refresh button.
【Android】
Make sure you are signed in with the Google Play Account you used to purchase nana premium.
If this is not helpful, please contact support by going to “Settings,” and then to “Contact.”

After registering for nana Premium, I uninstalled the app, but will I be able to continue using nana premium?
【iOS】
After re-installing the app, go to "My Page," and in "Settings," go to "nana Premium," and select "Restore."
【Android】
Make sure you are signed in with the Google Play Account you used to purchase in-app content.
  • ※If you are using multiple devices or multiple nana accounts, please be aware that: If you purchased nana premium on your iPhone device (Apple ID), nana Premium features will only be available to the accounts that share the same Apple ID (the one used to pay). If you purchased nana premium on your Android device (Google Account), nana Premium features will only be available to the accounts that share the same Google Account (the one used to pay).
I try to use premium features, but the registration page for nana premium features keeps popping up.
If you try to use nana Premium features without being registered for nana Premium, you will be moved to the nana Premium registration page. Please register for Premium in order to use Premium features.

After registering for nana Premium, I uninstalled the app, but will I be able to continue using nana premium?
If you try to use the Premium features without registering to nana Premium, you will be sent to the nana Premium registration screen. In order to use the Premium features, please register to nana Premium.

I changed devices, and now I'm no longer able to to use the Premium features.

【iOS】
Go to "My Page," and in "Settings," go to "nana Premium," and select "Restore."
【Android】
Make sure you are signed in with the Google Play Account you used to purchase nana premium.

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