Installation damaged

[IC3z]

Hello, I'm having problems with the game. Here is what I did:

Downloaded the game client from torrent (https://www.wow-freakz.com/wow/legion/WoW_Legion_torrent.torrent)
Modified the read-only property from Data folder
Launched launcher_freakz.exe and the game showed up an error ("The CAS system was unable to initialize...") so I deleted the config folder and replaced with the ones that are provided on the thread (https://forum.wow-freakz.com/WoW-Legion-client-t452441.html)

Now when I launch the game it shows installation damaged error
IMG: https://i.imgur.com/tlkBFeZ.png
I deleted the CASCRepair.mrk file and modified again the permissions of the folder

I downloaded battle.net app and scanned for the game
Tried scan&repair but it just gets stuck, and now shows this message
IMG: https://i.imgur.com/X1LezUk.jpg

I don't know what to do, I followed the guide and tried all the fixes. I don't want to download the game all over again because it would take weeks for me.
Isn't there any other fix? Have I missed something? Maybe a corrupted file or missing folder.
I have Windows 10 btw.

Waiting for some help