Same happened to me today as well. I've been owning the game for some time, played it over 100hrs and did nothing wrong. Last night was a usual play night and then the morning after I was unable to play and saw the same message as you did. In the email EA didn't share any details as well. I've filled the webform as well but I think that it is unfair to perma ban players who did nothing wrong without any proof or detail regarding the ban. I'll be waiting for the team to reach out to me regarding the issue. I also contacted the chat section on the website but unfortunately they can't help either. So, apparently there is no other way than just waiting for the EA team to reach out regarding the appeal for the ban.