Creating a new game account

Not to my knowledge and besides, why would you do that? On an android device you can just make a new gmail. Dunno how it works on iOS.

No you cannot make a new game with the same email/game center account. You will need to make a new email/game center account to start a new game.

What you can do right now is this:
1) Make a new gmail (Android) or AppleID (IOS).
2) Make a new SWGoH game linked to your new email
3) Make a cash purchase in the ingame store on your new account
4) Email Customer Support and copies of the reciepts of your purchase
5) Ask them to transfer your NEW account over to your OLD email

They will unattach your old account and transfer over your new account for you.