RektInator i tried but its not working

im trying to play B02 with my mates and i have a different patch code, mine is coming up with 43.0.1 and theirs is 43.1800.7 and its saying it cant connect to online servers, ive searched up what could be the problems and its saying the only thing i found is that i could have been TAC banned but i havent even played the game yet and ive allowed the game to come through all my antivirus, someone help?