You can change or add a payment method by following these instructions:
- On the Home screen, tap 'Settings' ⚙️
- Tap iTunes & App Store.
- Tap your Apple ID. (You might need to sign in with your Apple ID.)
- Tap View Apple ID.
- Tap Payment Information.
- Change your information and tap Done.
- On your Android device, open the Google Play Store
- Tap ☰ Menu → Subscriptions.
- Find your Straightaway subscription:
- For active subscriptions, tap Manage
- To fix an issue with your payment method, tap Update
- Follow the on-screen instructions to update your payment method.