It is managed by Google. You can view your subscriptions by following the steps:

  1. On your Android phone or tablet, open your device's Settings app > Google > Manage your Google Account.
  2. At the top, tap Payments & subscriptions.
  3. Tap Manage subscriptions.
  4. Tap the VPNSuper subscription that you want to manage.
  5. It will display all information about available subscription plans and active subscription plan (if any) for VPNSuper.

Alternatively, tap here to learn more.

If you subscribed through Apple iOS (through AppStore), here is the article.