Asus Zenfone 2 ZE551ML - tried to change firmware from CN to WW, huge problem.

Hi guys, I have a big problem with my Asus Zenfone 2 ze551ml. I bought it from china so I didnt have Google Play and I used to download every app I needed from Aptoide. But yesterday I decided to give it a try and change the firmware. I read every article on "how to", most of them were saying the same steps, so I started by downloading everything I needed, the WW firmware from asus site, the usb drivers, the adb program etc. Everything was going great, and I came to that point that you just have to send via adb the package with the WW firmware and... my laptop(which is an Asus, lol) stopped recognising my phone. Then I started reading tons of threads on how to fix that problem but nothing. I did everything.
Download the intel usb drivers for android- done
Manually install the usb drivers from Asus- done
Uninstall everything and trying one driver at a time- done
Usb debugging-MTP, all these things again and again- done
Tried every single usb cable and port- done
Tried 3 different computers- done
Wipe cache partioning and try all the above steps again- done
Wipe all user data back to default- done
And nothing.. I mean nothing, my phone is invisible to any computer. Is anything else I can do? What's left? To throw my phone away? Now everything in my phone is tiny, the app icons are tiny, the fonts are tiny, even the fb messenger bubble is tiny.. pls help me.. :crying:

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