Lg l bello d331 failed root

Hello i'm New :)
I have a little problem with my lg l bello.
It have android kitkat 4.4.2
I tried to root it with Vroot,it show me the happy face,i reboot my device,appear a New icon with a lion ,but the phone isn't root because i tried to check the root with rootcheck and it failed the test.Now i have a New system all and it can't ne deleted.How i can Fix this?
I want to root my l belli please

LG L Bello D331 Sim Service Disabled

LG L Bello D331 Sim Service Disabled

i search on may sites and found that there is problem in efs partition but i don't have any old efs backup.

please help me.
Thanks