i was stupid so i got banned so i buy arma 3 again on a ohter account but when i want to join today i got kicked inmidely why i can not begin with a clean sheat ?
Maybe because you are banned? You don't just get banned and then it gets forgotten about. I do also believe, according to Steam Security Services, you are only allowed to buy ARMA 3 on 1 Steam account but you could have it on more than 1 - you just have to pay for it again. You will have to go through the same procedure as everyone else who has been banned and you will have to apply here: https://www.roleplay.co.uk/forms/2-unban-appeal/
You have to appeal, not make numerous accounts to hope that you are unbanned. You will have to go through the same tunnel as everyone else.
You will still be banned... As I have already said, just make the appeal and hopefully you will get unbanned. There is no timeframe for your appeal so it will take as long as it does. You are essentially Ban Evading.