Hi mohammad9854

The ban message is from when you were trying to join JAH BF3 servers. The account "mhmd_iran_air" is not banned with us (JAH) but was temporarily linked to another player who is banned on both games. The ban enforcer system shows the reason for the original player who was banned.  

You should try to rejoin again. If you still get the message then contact JAH on our website or discord. 

Thanks

Alekann