First, let's double check what email address you used to log in.
You might have signed in with Apple/Facebook/Google sign in (rather than entering an email/password), which may be linked to a different email address.
Check by going to Discover >> Account Icon in upper right corner >> Manage Subscriptions, it will show the email address you used to sign in.
If you are still having issues, feel free to reach out to us at support@dipseastories.com.