Smurfing needs to have a ban-able offense, permanently

I'm sick and tired of going against smurfs when I can never reach to my actual rank where I belong, instead I get pushed down to bronze/silver because of these smurfs that have multiple accounts. There needs to be extreme punishments for this, it's ridiculous - it ruins the whole ranking aspect of the game and will destroy League of Legends as players wont want to play League of Legends anymore. I've had some great games, I consider myself a high silver division rank maybe even in the lower gold division rank, but can never reach it because of part of the reason of smurfing. Also trolls and afkers need severe punishment OR the ranked system has to be fixed.