My account got banned for no reason
When you got banned you should've received an email, this includes the reason of your ban.
Sometimes the mail can filter this to the spam folder, so I'd recommend looking around your inboxes.
Lets say you hypothetically got banned for cheating, that means that they cannot disclose much more to you except for the part that you engaged in cheating.
For bans related to abusive chats, you'll typically get the chat transcript that resulted in the account action.
Other breaches of the User Agreement aren't always really mentioned specifically, or could be rather vague.
You could be banned for fraudulent activities, which typically happens when you chargeback money via a bank.
Other bans like account sharing aren't really specifically mentioned as far I'm aware, though then again, I don't work for EA so I wouldn't really know.
If you want more information about your ban then I'd recommend to specifically mention that when writing a ticket to the ToS team, most tickets are usually sent with the intent to appeal the action rather than getting more information about the ban from what I've personally seen.
Though do note that the account action will most likely not be changed as they've already investigated the matter fully and have decided to uphold the ban.
