How to fix specific problem on Mavericks 10.9.5?

I had a problem with Yosemite so I had to downgrade (Wi-Fi went off after 10 or so seconds of connecting to a network) to Mavericks, but now I don't have Wi-Fi at all-

1. 
   

   The interface does not appear listed under System Preferences → Network.

   
   


2. 
   

   After I turn on the Interface name that should represent the Wi-Fi (en1) I can't turn on the Airport app via Terminal with the command…

   
   

   
   sudo networksetup -setairportpower en1
   
   

   
   

   I still get the message:

   
   

   
   

   You cannot set Wi-Fi power because all Airport network are disabled.

   
   

   
   

   If I use the option -createnetworkservice AirPort en1 I get the error

   
   

   
   

   Unable to access the System Configuration database.

   
   

   
   


3. 
   

   I already deleted everything in /Library/Preferences/SystemConfiguration/

   
   


4. 
   

   It is weird but when I click the "+" Icon on the network services am interface named "Thunderbolt 1" appears, if I try to make a new service out of this Interface after I click the "Create" button no service is created.

   
   


5. 
   

   If I run sudo networksetup -listallhardwarereports I get Ethernet, Firewire, Thunderbolt1(en1), Thunderbolt Bridge (bridge0).

   
   


6. 
   

   On the system information app if I go to Wi-Fi some info is displayed.

   
   

I just don't really know what to do anymore.