Problem installing the ROM downloaded from your website

I already know that this problem in treated in many thread, but no one of the solution proposed works.
I apologize if this is the wrong place.
Hi i'm alberto, and i'm new for the forum.

I'm really going crazy as i tried to root my new alcatel idol3 6045y with King user, but after for an error I unistalled it. After that i tried to root with kingo and then with SuperSU. This made a big mess on my phone that now result nrooted. But none of these3 rooting app works!
I' would like to restore the real factopry state. But the factory reset doesn't do that. For this reason i downloaded the zip restore file for my phone (Model: 6045Y(Europe) Firmware: 5.0.2-010 06) from this thread http://forum.xda-developers.com/idol...dates-t3163745
I also have the twrp-2.8.7.0-idol3 installed on my phone.
I also followed this thread ( http://forum.xda-developers.com/idol...catel-t3161878 ) to find the way to install that ROM, without success. i also installed the root from the zip file in the twrp, but again without success!!

I downloaded the 6045Y 5.0.2-010 06 TWRP backup (includes boot and system image).zip as I didn't the backup before rooting. I know i'm really stupid, but know it's to late!!

I wiped all data and formatted everithing and then tried to installi the 6045Y 5.0.2-010 06 TWRP backup (includes boot and system image).zip but it says FAILED! and i noticed that it start sayng E: Find_File: Error opening 'sys/class/backlight'

I really don't know whta to do right know :confused::(
PleasePlease
Please Please Help ME!!!!
i'll be very grateful to who will help me to install the factory ROM!