This simple script can be helpful
function OnCommand(ID: byte; Text: string): boolean;
var
player_id: integer;
begin
if(GetPiece(Text, ' ', 0)='/ban') then begin
Result:=true;
try
player_id:=strtoint(GetPiece(Text, ' ', 1));
BanPlayerReason(player_id, 43200, 'Contact via email: example@gmail.com');
except
WriteConsole(ID, 'Wrong player ID!', $FF0000);
end;
end;
end;