Help with configs

Hey all im having issues with my config, its not updating everytime my player kills another it always says Andrewcpu, now has 3,

code:

Code:java

EventHandler
    public void death(PlayerDeathEvent event) {
        int current = getConfig().getInt(event.getEntity().getKiller().getName());
        int after = getConfig().getInt(event.getEntity().getKiller().getName()) + 1;
 
        getConfig().set(event.getEntity().getName(), after);
        saveConfig();
        reloadConfig();
        Bukkit.broadcastMessage(event.getEntity().getKiller().getName() + ", has just reached " + getConfig().getInt(event.getEntity().getKiller().getName()));
        if((boolean) getConfig().get("groups.yml")) {
            if(getConfig().get(event.getEntity().getName()) == getConfig().getConfigurationSection("groups.yml").get("Group1KillAmount")) {
 
                permission.playerAddGroup(event.getEntity().getKiller(), getConfig().getConfigurationSection("groups.yml").get("Group1").toString());
                Bukkit.broadcastMessage(event.getEntity().getKiller().getName() + ", has just been promoted to " + permission.getPrimaryGroup(event.getEntity()));
            }
        }
    }

My config:

Code:

Andrewcpu: 3
deadlydavis12: 0
lexie_heuston: 4

It doesnt update and it would be helpful to know if im doing my groups.yml right.

 

Replace

Code:java

getConfig().set(event.getEntity().getName(), after);

with

Code:java

getConfig().set(event.getEntity().getKiller().getName(), after);