Re: my account got ban
EA already provided you the link in their message to you on background and steps ahead if you want to appeal your ban.
Regarding bans, then it is rarely happening on the very same day as of the offense.
So your account's misbehavior may very well have taken place many days ahead of when final ban was put into effect.
Funny as well that you left in your browser window the hyperlink leading towards your Battfield1 Nexus modz.
Maybe there is a connection...