Don't waste your time, buddy. I got the same treatment for "Grandpa Malf" and fought it for like a month with no resolution. My name is still locked to this day. The admins here have no power to do anything, and the people who place the bans on accounts:
1 - appear to be outsourced workers who have no grasp of what is and is not offensive, and
2 - don't even read your disputes. The just deny your appeal and consider the matter resolved.
Basically, EA is making up for a decade+ of allowing horrifically racist and offensive names by throwing the ban hammer at anyone who is reported. Seriously, you can go back and forth all you want here, but it will get you nowhere. You may eventually get suggestions of trying EA Help on Twitter and Facebook, but both are dead ends. The mods are nice, but they are utterly powerless to do anything. Basically just customer service reps. It's the most pathetic and neglectful treatment I have ever seen as a gamer in my 42 years on this earth. But, EA is just a corporation at the end of it all, and they could not care less about gamers like you and I when it comes to matters like this.
Sincerely,
Grandpa Malf (name too hot for NHL 21)