It’s extremely important to use the correct credentials when logging in, so please make sure you’re connecting to the right Game Center account. If you can’t prompt your desired account with the email address you’re using now, that means you are not using the right one.
To properly access your account, please:
1) Login using the e-mail address originally used to sync your account
2) If it’s an old email, contact Apple Support to recover your account’s information.
Supercell cannot access Game Center account info, as we only see related accounts as a numerical value. Given that fact, we need help from both you and Apple in finding the correct login details used for recovering your account.