It is possible that, as soon as you log into your account, you will see that you have lost your level and statistics. We want you to know that, for your peace of mind, you have not lost your progress; the problem is that you entered with a different email address than the one you used to create your account originally.
To fix the situation, log out of your current account by going to Settings (gear icon in the upper right corner) and then selecting "Sign out."
Once you do, log in with your original email address and password, and that way you will recover your statistics and game items.
If you don't remember your password or have access problems, please contact our Support Center here, so we can help you.