Use the right email — a different email is a different account.
Check spam/junk for the code; codes are time-limited, so request a new one if it expired.
Make sure you have the latest Scout version from Google Play and a stable connection.
Subscription missing after signing in? Tap Restore in Settings, using the Google account you bought with.
Still locked out? Email support@searchscout.app from the address you signed up with and we'll restore access.