So you linked two accounts to the same email? If that’s the case, you most likely overwrote your main account. Still, here’s what you can try: if your main was linked to Google, Facebook, Apple ID or EA ID, try logging in with each of those in the game. If it was properly linked, you might get lucky and recover it. If it wasn’t linked, you can try raising a ticket with EA Helpdesk, but based on your description and the fact that you used the same email for two accounts, it really does look like it was overwritten.
As 11DeadlyKnights said if you have your original UID, it can be restored.
See the guides:
[GUIDE] EA Account Help: No Access, Disabled Accounts, Hacks, Bans, and More | EA Forums - 12464603